“If you’ve got 50 kids out there on trampolines, well, after a couple of weeks 25 of them are going to be better than the other 25. And the ones that are not so good at it drop out. Later you’ll find there are maybe 12 left. And pretty soon there’s just a hard core.” – George Nissen, gymnast and co-creator of the modern trampoline.
It’s a shame spaceball never caught on.
(via Atlas Obscura)