LIMITED POWER OF ATTORNEY FOR
                     SECTION 16 REPORTING OBLIGATIONS

Know all by these presents, that the undersigned hereby makes, constitutes and
appoints Louis Rassey, Patrick McCusker and Prithvi Gandhi, and each of them
signing singly, and with full power of substitution and resubstitution, each
with the power to act alone for the undersigned's and in the undersigned's
name, place and stead, in any and all capacities to:

    (1) with respect to the equity securities of Fast Radius, Inc., a Delaware
        corporation (the "Company"), prepare, execute, acknowledge, deliver and
        file with the United States Securities and Exchange Commission (the
        "SEC"), any national securities exchanges and the Company, (i) a Form
        ID, and any amendments thereto, Update Passphrase Confirmation, and any
        other documents necessary or appropriate to obtain codes and passwords
        enabling the undersigned to make electronic filings with the SEC, and
        (ii) any and all reports (including Forms 3, 4, and 5) and any
        amendments thereto, as considered necessary or advisable under Section
        16(a) of the Securities Exchange Act of 1934 and the rules and
        regulations promulgated thereunder, as amended from time to time (the
        "Exchange Act");

    (2) seek or obtain, as the undersigned's representative and on the
        undersigned's behalf, information regarding transactions in the
        Company's equity securities from any third party, including the Company
        and any brokers, dealers, employee benefit plan administrators and
        trustees, and the undersigned hereby authorizes any such person to
        release any such information to the undersigned and approves and
        ratifies any such release of information; and

    (3) perform any and all other acts which in the discretion of such
        attorney-in-fact are necessary or desirable for and on behalf of the
        undersigned in connection with the foregoing.

The undersigned acknowledges that:

    (1) this Power of Attorney authorizes, but does not require, such attorney-
        in-fact to act in his or her discretion on information provided to such
        attorney-in-fact without independent verification of such information;

    (2) any documents prepared and/or executed by such attorney-in-fact on
        behalf of the undersigned pursuant to this Power of Attorney will be in
        such form and will contain such information and disclosure as such
        attorney-in-fact, in his or her discretion, deems necessary or
        desirable;

    (3) neither the Company nor such attorney-in-fact assumes (i) any liability
        for the undersigned's responsibility to comply with the requirements of
        Section 16 of the Exchange Act, (ii) any liability of the undersigned
        for any failure to comply with such requirements, or (iii) any
        obligation or liability of the undersigned for profit disgorgement
        under Section 16(b) of the Exchange Act; and

    (4) this Power of Attorney does not relieve the undersigned from
        responsibility for compliance with the undersigned's obligations under
        Section 16 of the Exchange Act, including without limitation the
        reporting requirements under Section 16 of the Exchange Act.

The undersigned hereby gives and grants the foregoing attorneys-in-fact, and
each of them, full power and authority to do and perform any and every act and
thing whatsoever requisite, necessary or appropriate to be done in and about
the foregoing matters as fully to all intents and purposes as the undersigned
might or could do if present, with full power of substitution and re-
substitution, hereby ratifying and confirming all that such attorney-in-fact,
or his or her substitute or substitutes, shall lawfully do or cause to be done
by authority of this Power of Attorney.

This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file reports (including Forms 3, 4 and 5)
under Section 16 of the Exchange Act with respect to the undersigned's
transactions in equity securities of the Company, unless earlier revoked by the
undersigned in a signed writing delivered to such attorney-in-fact.

                            [Signature page follows.]

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be
executed as of this 7th day of February, 2022.

                                   /s/ Matthew Maloney
                                   -------------------------------
                                   Matthew Maloney