I was at North Star Mall with some time to kill. I had always wanted to try to get photographs of people coming up the escalator so that it showed only their head at floor level. Here was a chance to try that. I scouted out a spot in the food court where I would have a clear view of the escalator coming up from the first level. I sat at a table and put my camera on the chair next to me with the lens (200 mm) aimed toward the escalator. I turned the articulated LCD up so I could see it, Since I could not count on autofocus to pick up the person's head, I used manual focus. I have a wired remote switch that I plugged in and held in my hand. Regrettably I did not think to use burst mode on the shutter. I could have gotten a lot better positioning of the person in the shot. Here is one of the results.
One problem I did not anticipate was the traffic in the area. Since I was about 30 feet from the target, there was a lot of foot traffic coming off the escalator or going to the down side. So I had to wait for them to clear before I could take a shot. Someday I may try again. And I'll use the burst mode for sure.