I'm amazed how many photos I've got of people walking away from me (look: here's another!). The problem was, I'd be right at the front of the group, and I'd pause to take a photo, and by the time I'd framed the shot, I was at the middle of the group, and by the time I'd taken the shot, I was at the back! Still, got me warmed up, running to the front so I could take another. :-)