Halo Cheats :
faTer warthog use
The trick works best in multi player mode. Drive the warthog in a straight line. When you see an enemy jump out of your warthog. Tap x reapeteadly and sidestep to the right. If you are fast enough you will exit the warthog and jump on the LAAg gun without stopping while the warthog slows down. This also works on ice because you keep sliding.