Leaning against a rock club's "wall of speakers" it was quite strange since when you wake up you body adjusts to the sound around it and sets that as "normal" and well I was pretty much deaf for a day thanks to that! :@

Second weirdest place I fell asleep was probably when I fell asleep in my friends house with one person in bed with me (we were sharing innocently, with clothing worn) and woke up with 2 people in bed with me all 3 of us mostly naked :S damn copious amounts of alcohol, I wanted to remember that!