Jam a bunch of people together in a tight space like a bus or the subway and something crazy is bound to happen. What's the most memorable thing you've seen on mass transit?
Just before Christmas, back when I was in high school, I was waiting at the Lakewood Mall for a Long Beach Transit bus. The bus that showed up was totally different from the usual LBT fare, it was all decked out for the season and the driver had a boombox playing Christmas music. Everyone on the bus was singing carols and stuff. That was fun.