Actually the trampoline does help. but not that much when it comes to rotations. you can learn how to do flips, cartwheels, laid back, front flips, backflips, and rodeo. the problem when it comes to rotations is that the movement of the upperbody should be focused on a lot and you have to keep your legs the same way your board and bindings are set up. best place to learn rotations is on flat land. Use the same techniques that you would do on the big booters. but do know the more you can achieve on land, the more you'll be able to pull off dope tricks on kickers and drops!