you can use your skis on trampolines. I've done it heaps. It is hard, and a lot of work. If you are not on a olympis, rectangle trampoline, it does not work real well though. It halps so much with tricks, practicing with your skis on. If you can do it with skis on the tramp, you can do it on the snow...it is exactly the same thing. you just need to be very careful when attempting this, because jumping off balence or falling can really hurt.