Promissory Note, dated May 12, 2006

Exhibit A

THIS AGREEMENT RELATES TO AN OFFERING OF SECURITIES IN AN OFFSHORE TRANSACTION TO PERSONS WHO ARE NOT U.S. PERSONS (AS DEFINED IN REGULATION S UNDER THE 1933 ACT) I’URSUANT TO REGULATION S UNDER THE UNITED STATES SECURITIES ACT OF 1933, AS AMENDED (THE “1933 ACT”). NONE OF THE SECURITIES TO WHICH THIS AGREEMENT RELATES HAVE BEEN REGISTERED UNDER THE 1933 ACT, OR ANY U.S. STATE SECURITIES LAWS, AND, UNLESS SO REGISTERED, NONE I~1AY BE OFFERED OR SOLD, DIRECTLY OR INDIRECTLY, IN THE UNITED STATES OR TO U.S. PERSONS (AS DEFINED HEREIN EXCEPT IN ACCORDANCE WITH THE PROVISIONS OF REGULATION S UNDER THE 1933 ACT, PURSUANT TO AN EFFECTIVE REGISTRATION STATEMENT UNDER THE 1933 ACT, OR PURSUANT TO AN AVAILABLE EXEMPTION FROM, OR IN A TRANSACTION NOT SUBJECT TO, THE REGISTRATION REQUIREMENTS OF THE 1933 ACT AND IN EACH CASE ONLY IN ACCORDANCE WITH ALL APPLICABLE SECURITIES LAWS. IN ADDITION, HEDGING TRANSACTIONS INVOLVING THE SECURITIES MAY NOT BE CONDUCTED UNLESS IN ACCORDANCE WITH THE 1933 ACT.

US $2,500,000.00

TERAX ENERGY, INC.

12.5% PROMISSORY NOTE

          FOR VALUE RECEIVED, Terax Energy, Inc., a corporation organized and existing under the laws of the State of Nevada (the “Company”), promises to pay to Paul A. Turner, Trustee, the registered holder hereof (the “Holder”), the principal sum of Two Million Five Hundred Thousand and 00/100 Dollars (US $2,500,00Q.00) on the Maturity Date (as defined below) and to pay interest on the principal sum outstanding from time to time in arrears at the rate of 12.5 % per annum (computed on the basis of the actual number of days elapsed and a year of 365 days), accruing from the date of initial issuance of this Note (the “Issue Date”), until payment in full of the principal sum has been made or duly provided for (whether before or after the Maturity Date).

          This Note is being issued pursuant to the terms of a Purchase Agreement, dated as of the date hereof (the “Loan Agreement”), lo which the Company and the Holder (or the Holder’s predecessor in interest) are parties. Capitalized terms not otherwise defined herein shall have the meanings ascribed to them in the Loan Agreement,

          This Note is subject to the following additional provisions:

           1. The term “Maturity Date” means the date occurring at any time after December 31, 2006 upon which the Holder demands payment of this Note in writing.

          2.           (1) This Note may be prepaid in whole or in part at any time prior to the Maturity Date, without penalty. Any payment shall be applied as provided in Section 3. The Company further agrees that in the event that the Company does a subsequent debt or equity financing for Five million and 00/100 Dollars (US $5,000,000.00) or greater before the Maturity Date the Company will repay Note plus accrued interest from the proceeds of that financing.
           (ii) The Company shall be in default hereunder if any payment is not made in a timely maimer, or within five days thereafter.

           3. Any payment made on account of the Note shall be applied in the following order of priority: (i) first, to accrued interest through and including the date of payment, and (iii) then, to principal of this Note.

          4. All payments contemplated hereby to be made “in cash” shall be made in immediately available good funds of United States of America currency by wire transfer to an account designated in writing by the Holder to the Company (which account may be changed by notice similarly given). For purposes of this Note, the phrase “date of payment” means the date good funds are received in the account designated by the notice which is then currently effective.

          5.  Subject to the terms of the Loan Agreement, no provision of this Note shall alter or impair the obligation of the Company, which is absolute and unconditional, to pay the principal of, arid interest on, this Note at the time, place, and rate, and in the coin or currency, as herein prescribed. This Note is direct obligations of the Company.

          6. No recourse shall be had for the payment of the principal of, or the interest on, this Note, or for any claim based hereon, or otherwise in respect hereof, against any incorporator, shareholder, officer or director, as such, past, present or future, of the Company or any successor corporation, whether by virtue of any constitution, statute or rule of law, or by the enforcement of any assessment or penalty or otherwise, all such liability being, by the acceptance hereof and as part of the consideration for the issue hereof, expressly waived and released.

           8. The Holder of the Note, by acceptance hereof, agrees that this Note is being acquired for investment and that such Holder will not offer, sell or otherwise dispose of this Note except under circumstances which will not result in a violation of the Securities Act of 1933, as amended~ or any applicable state Blue Sky or foreign laws or similar laws relating to the sale of securities.

           9. Any notice given by any party to the other with respect to this Note shall be given in the manner contemplated by the Loan Agreement in the section entitled “Notices,”

          10. This Note shall be governed by and construed in accordance with the laws of the State of Nevada. Each of the parties consents to the exclusive jurisdiction of the federal courts whose districts encompass any part of Nevada or the state courts of the State of Nevada in connection with any dispute arising under this Agreement and hereby waives, to the maximum extent permitted by law, any objection, including any objection based on forum non coveniens, to the bringing of any such proceeding in such jurisdictions. To the extent determined by such court, the Company shall reimburse the Holder for any reasonable legal fees and disbursements incurred by the Holder in enforcement of or protection of any of its rights under any of this Note.

          11.  Jury Trial Waiver. The Company and the Holder hereby waive a trial by jury in any

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action, proceeding or counterclaim brought by either of the Parties hereto against the other in respect of any matter arising out of or in connection with this Note.

          12. The following shall constitute an “Event of Default”:

If an Event of Default shall have occurred, then, or at any time thereafter, and in each and every such case, unless such Event of Default shall have been waived in writing by the Holder (which waiver shall not be deemed to be a waiver of any subsequent default) at the option of the Holder and in the Holder’s sole discretion, the Holder may consider this Note immediately due and payable (and the Maturity Date shall be accelerated accordingly), without presentment, demand, protest or notice of any kinds, all of which are hereby expressly waived, anything herein or in any note or other instruments contained to the contrary notwithstanding, and interest shall accrue on the total amount due (the “Default Amount”) on the date of the Event of Default (the “Default Date”) at the rate of 16% per annum or the maximum rate allowed by law, whichever is lower, from the Default Date until the date payment is made, and the Holder may immediately enforce any and all of the Holder’s rights and remedies provided herein or any other rights or remedies afforded by law.

          The Company covenant and agree that, so long as any principal of, or interest on, this Note shall remain unpaid, unless the Holder shall otherwise consent in writing, it will comply with the following terms:

                    (a) Reporting Requirements. The Company will furnish to the Holder or make publicly available:

                    (i) as soon as possible, and in any event within ten (10) days after obtaining knowledge of the occurrence of (A) an “Event of Default,” as hereinafter defined, (B) an event which, with the giving

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of notice or the lapse of time or both, would constitute an Event of Default, or (C) a material adverse change in the condition or operations, financial or otherwise, of the Company, taken as whole, the written statement of the Chief Executive Officer or the Chief Financial Officer of the Company, setting forth the details of such Event of Default, event or material adverse change;

          (ii) promptly after the commencement thereof, notice of each action, suit or proceeding before any court or other governmental authority or other regulatory body or any arbitrator as to which there is a reasonable possibility of a determination that would (A) materially impact the ability of the Company to conduct its business, (B) materially and adversely affect the business, operations or financial condition of the Company, or (C) impair the validity or enforceability of the Note or the ability of the Company to perform their obligations under the Note.

          (b) Compliance with Laws. The Company will comply, in all material respects with all applicable laws, rules, regulations and orders, except to the extent that noncompliance would not have a material adverse effect upon the business, operations or financial condition of the Company taken as a whole.

          (c) Preservation of Existence. The Company will maintain and preserve its existence.

          (d) Maintenance of Properties. The Company will maintain and preserve, all of its properties which are necessary in the proper conduct of its business in good working order and condition, ordinary wear and tear excepted, and comply, at all times with the provisions of all leases to which it is a party as lessee or under which it occupies property, so as to prevent any forfeiture or material loss thereof or thereunder.

          (e) Maintenance of Insurance. The Company will maintain, with responsible and reputable insurers, insurance with respect to its properties and business, in such amounts and covering such risks, as is carried generally in accordance with sound business practice by companies in similar businesses in the same localities in which the Company is situated.

          (f) Keeping of Records and Books of Account. The Company will keep adequate records and books of account, with complete entries made in accordance with generally accepted accounting principles, reflecting all of its financial and other business transactions.

          14. In the event for any reason, any payment by or act of the Company or the Holder shall result in payment of interest which would exceed the limit authorized by or be in violation of the law of the jurisdiction applicable to this Note, then ipso.facio the obligation of the Company to pay interest or perform such act or requirement shall be reduced to the limit authorized under such law, so that in no event shall the Company be obligated to pay any such interest, perform any such act or be bound by any requirement which would result in the payment of interest in excess of the limit so authorized. In the event any payment by or act of the Company shall result in the extraction of a rate of interest in excess of a sum which is lawfully collectible as interest, then such amount (to the extent of such excess not returned to the Company) shall, without further agreement or notice between or by the Company or the Holder, be deemed applied to the payment of principal, if any, hereunder immediately upon receipt of such excess funds by the Holder, with the same force and effect as though the Company had specifically designated such sums to be so applied to principal and the Holder had agreed to accept such sums as an interest-free prepayment of this Note. If any part of such excess remains after the principal has been paid in full, whether by the provisions of the preceding sentences of this Section or otherwise, such excess shall be deemed to be an interest-free loan from the Company to the Holder, which loan shall be payable immediately upon demand by the Company. The provisions of this Section shall control every other

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provision of this Note.

          IN WITNESS WHEREOF, the Company has caused this instrument to be duly executed by an officer thereunto duly authorized this 12^th day of May, 2006.