back to halo 1 for a second. when playing warthog flip (warthog tiggy, destruction derby (you ram the warthogs head on)) if you press the handbrake button (A) it forces the nose of the warthog down and will always send the other driver over the top and flipped.
Your friendly neighborhood gamer... Nawat
I don't play Halo 1 anymore.
On Halo 2 Zanzibar, take a scorpion and try to get it flipped over by sticking it in the big wheel.
Once flipped over, stand on top of it and flip it over again, should send you flying.