I get pins and needles pretty often if I lie on a limb for too long...but I don't recall ever actually having a body part fall asleep on me...I guess I'm too fidgety when I'm sitting or lying still. :/
I do that too, on embarrassing scenes.
But I can't sit still and not do anything most of the time. And then something happens in the movie and I have to pause the movie and everything I'm doing to hide somewhere or tell the character that they shouldn't do that. (.>>)