Check out the temperatures on the motherboard (left) and CPU (right) — pushing clock speeds far beyond factory limits requires insane cooling.
Pots being used on every setup to pour in the liquid nitrogen. Insulation is critical to prevent build up of condensation.
Jake from Ironmods pours in fresh liquid nitrogen, which evaporates quickly, causing the cloud you see.
The OCForums crew seen here behind their setup. Rita Kuo (lady in pink) from Gigabyte shows up to check out the show.