Loading Zone Glitch
If you can get an enemy past their loading zone(the area that keeps the AI in the enemy) they will stop moving. Their bodies will stand still and they will give off blood and most explosions will post-pone and be set off at the same time. So have fun blowing up poor defenseless grunts.
If you need more help, we've got more Halo: Combat Evolved cheats and also check out all of the answers for this game
Comments for this hint