Have you ever been walking somewhere and seen something very strange, and realised that if you hadn’t been there at that exact time, you never would have seen it?
Yesterday I was walking back to my car in the parking structure downtown, and I look up to see some guy, who had been parked in front of one of the ramps to the roof, back out of his parking space and up the ramp really fast. It was quite wierd. There is no exit from the roof. And he never came back down in the time it took me to get my stuff settled and leave. Who knows.