I would doze off during an especially boring talk only to be woken up each time the audience applauded.
I didn't remember how awesome it was to do this until you mentioned it--I freaking loved sleeping through the talks and not getting caught, and for some reason I actually liked getting woken up during the applauds--it was kinda like a reminder that I was getting away with it. And when we could get our dad to sit in the highest seats so we didn't freeze to death, all the better--no one behind you to see you nod off.