While not the most bizarre experience of my life, this one's probably up there. I used to hang around the center and square area of my hometown as a teenager, and there was a kid around our age who would ride his bike around alone, he didn't seem to have friends. We actually tried to break the ice with him but it never got past "hello" with him still pedaling by about as fast as he could. One time he came out of a side street by us into the main road and was struck by an suv and knocked to the ground. It seemed to happen in slow-motion for me like these things do. I was sure he was dead, but he immediately got up, ran across the street with a duffel bag and hid it in the bushes in front of a building, then went back to the scene and rolled around on the ground in agony. When the police showed up, other bystanders told them about the duffel bag and they retrieved it. Poor kid. I have no idea what was in it, surely something of interest.