for those of us who don't have $ to buy materials to make a rail, or if you are absolutly clueless on how to use a hammer, here is what i have. I use a "kiddy" picnic table thats like 3ft off the ground, place that next to a trampoline. then on top of the table place a skateboard deck with no trucks or wheels on it. Then procede to jump on the trampoline and travel form the tramppoline landing on the skatedeck, the deck should slide like a rail. once you have this down you can start spinning 270's and such. Not the greatest, no real alternative than a real rail, but its fun.