Over-clocking the Atari 8-bit with liquid nitrogen

I remember seeing an article circa ~1996 involving a Macintosh Color Classic and liquid nitrogen to over-clock the cpu to somewhere around 1GHz speed. As this is incredible, I wonder if this is even possible on the Atari 8-bit line. It would make for an "unorthodox" upgrade - an incredible speed boost while keeping the 8-bit as original as possible. Hopefully all chips involved in being cooled are of the CMOS type, as I don't believe this idea is feasible if they are NMOS chips.

Any ideas?