Pulling the throttle in mid air will raise the front end up. Hitting the brakes in mid air will lower the front end of the truck. If you wanna do a back flip, make sure you don't hit the ramp with the truck totally at WOT. You need to still have a little bit of acceleration to pull the truck around in the back flip. Right when the truck leaves the ramp, hit WOT and your truck should do a backflip. If you wanna do a front flip, hit the ramp as fast as the truck will go, and right when it leaves the ramp hit the brakes. Those are the basics. You can also experiment with turning the front wheels side to side while your at WOT in the air. That should throw the truck sideways.

The Emaxx is a great jumper, so have fun with it.