Why can't people ever shut up?

Last night, my friend Peter and I took a bus down to Summerfest, and for some reason every one on the bus decided that they had to be as loud as humanly possible. The whole back section was clapping their hands and singing songs like "Tubthumper," while a couple of annoying teenaged girls kept screaming everytime the bus came to a sudden stop or made a sudden turn. I was convinced that I had died and gone to hell. After last night, my hatred for humanity has shot up another 350%.