I had the most unexpected one a couple days ago. Not in a commute, but a simple ride a couple miles to the store. It was a pedestrian screamer. There's a short, two block area where I'm forced onto the sidewalk from a busy 4-lane road with no lane. There was a ped walking down the middle (of course) so I gave her a loud "Head's Up!" as I slowed down. As I passed her, she started running and yelling "God Loves You!" over and over at me.