I always got a kick out of 007 Goldeneye cheats in facility:
fast 007
slow NPCs
invisibility mode
so, run around to find a scientist working on a computer:
Shoot the scientist in his extrimities, (hands feet etc) and soon, he will pull out a grenade and throw it in your general direction, which will concequently be near himself. run away, and he will blow up, and fly away. It's pretty funny