What shape of trampoline is best for tumbling?

A round circle trampoline, because you can jump freely end-to-end. An oval is just disgusting, since you can barely do your flips. And rectangle you can't go end-to-end, you have to leave a space because it's a rectangle, and you can only go horizontal and vertical, not diagonal, like a circle. Hope this helps. I'd say a round trampoline.

~Splitz.monkey13~