If I can stay awake long enough, I find it hilarious to watch people nod off to sleep on the bus. Usually they wake up when their head drops violently against their chest, then look around guiltily to see if anyone notices they're drooling. But sometimes folks get pretty comfortable. I have about a 20 minute bus and there's one guy who sometimes gets so deep into sleep in that short time that he starts snoring.
Well, a big thank you to Joel for sending me a link to the POOPT website- standing for 'Passed out on public transportation'. Take a look and see if you see yourself. You can submit pictures too. I'm trying to catch the kid on my bus sleeping who always leaves a big smear mark on the window, but so far no luck.