What is the strangest place you've fallen asleep?
Mine is when I was in Army Basic Training. We had these transport vehicles that we called Cattle Cars. Imagine a bus, but without any seats.
We would all pack in to them so that we're standing shoulder to shoulder and chest to back, squeezed in like sardines.
Since sleep was so precious, and since the trips to the Training Grounds could be an hour or so, we all basically agreed to just lean to one side and take a nap standing up.