This was taken inside the Vatican. The shutter was open 4 seconds. In that time, all the tourists were moving and blurred to obscurity, except the nun who managed to remain still.
I took this last week. I was just shooting the ocean when this guy walks into the shot just as a wave was coming. I was thinking to myself "just my luck"! I took the shot anyway. I ended up liking it the best of all. It's the only shot I took with a person. He disappeared as fast as he showed up. (3.6 sec exposure)