Oops I did it again - with TWO feet wrapped in foil. Am I stubborn? Let me tell you up front, no lucid dreams. But wait! This time I overheated. Maybe my room was a bit hot, anyway in the early morning I got too uncomfortable to continue and peeled off the foil. I say peeled off because it kind of sticked to my feet because of sweat.
On the bright side, at some point I was dreaming that I am pissing (literally), being semi-aware that I am actually in my bed and keeping the valve shut. The prolonged and copious piss was quite pleasurable. Try it when you have an opportunity.