The researchers gave a group of 24 fit college kids ... in jumping, the trampoline absorbs some of that shock, causing the impact forces on the feet and lower extremities to ease up, he says.

They already make their cars hop up and down effortlessly, as if they were playing a video game; the timing, the control, these kids have it all down. See All 14 Photos Owner: Tia "Yoohoo ...