Replying to BACKYARD SCAFFOLD JUMP

hey, im planning on building a jump in my backyard for summer use. im planning on building the in-run out of scaffolding, which wont be that hard for me to get, and i was going to use in door out door carpeting and wet it down real good. but then i was thinking about building a jump, but i dont have anything to land in, like a pool or something. so then i thought about a 1/4 pipe, but i dont know how i would make that, and what i would put on the transition so that i could go up and come down easily. well thanx for reading, and please reply!