I've just hijacked a bungee ball which my ex-colleague has left behind. At least I call it a bungee ball for lack of a better description. It's a ball attached to a real long elastic cord which ends with a strap to be wrapped around the wrist. The idea is to throw the ball as far away as possible and to miraculously flick it back into your hand. Like a yoyo on extensions. I kept trying it out but somehow the cord is too long, or I didn't get its unpredictable flight path. The ball never returned to my hand. Hmm.