[sammyg2]

The bicycle thing is prolly caused by pressure on a nerve, but the sleeping thing reminds me of something that happened years ago when I had back surgery.

I'd wake up from the demmoral induced sleep and half my hand would be numb.
This went on for several days. They did MRI's and all kinds of diagnostics trying to discover if somehow the nerves to my hand were damaged by the surgery or if i had a spinal infection or whatever.

Turns out the drugs were knocking me out so well that I'd fall asleep on my back with my hands folded on my chest and wouldn't budge until the drugs wore off several hours later.
With my elbow cocked like that it reduced the blood flow to my hand and basically put it to sleep.

The doctor told the nurse to change my sleeping position if she observed me sleeping on my back like that, problem went away.

Figure out of you are sleeping with your elbow contracted past 90 degrees, that should be an easy possibility easy to rule out.