Just assembled a mini-trampoline and successfully bounced up and down for the first time while holding onto a chest of drawer for balance. Quite a hard thing to do, bounce and keep the balance, when one has PD and a bad knee. I hope I can do this with some benefit for balance and for circulation. Yes, I know it seems I am using a device that mimics the cog-wheeling I already have in my legs. But besides that humorous circumstance, the mini-tramp is something other than the exercise bike, which has become harder and harder to mount. I'm sure bailey already uses one as a part of his circuit training. Long live the bouncers!