Syphon Filter 2 Cheats

When you are playing two player mode. Go to a level where there is a cliff and have player one or two go to the edge of the cliff and make them aim down. Be sure that the player is holding the L1 button, if the player let goes of L1 this glitch wont work. Now have the other player go behind the player who is aiming down and push them off the cliff. After that you will stay virtually invincible. The only things you can't do are change weapons, and aim and go over cliffs.