Game Glitches

Say all the glitches you have come across in games and how to make them reoccur.

Like for instance In time splitters 2 it is possible to get into the outer game area by jumping off a ledge into a wall with the speedy pill at some locations.

in True Crime you can invert the whole world so your standing on the sky by accelerating really quickly off a building into a wall.

There are a shitload in StarCraft.

-By building a hatchery somewhere and then quickly telling the drone to move there, you can make the drone temporarily invincible and "fly" to the spot.
-Burrow a zergling or a hydralisk, have a zergling stand on top, and unburrow the zerg to watch the one on top "glitchjump" somewhere else.