I enjoyed the experience of being a part of an aircraft photoshoot. It's even more interesting when you're flying an ultralight aircraft!
The photo session had several parts:
a) Some fly-bys, down the runway, to the left and the right of the photographer. My objective was to keep the wheels one feet off the runway, and to keep a wingtip over his head as I passed by. I was free to start a pullup when I was within 100 feet of him.
b) This was followed by some detail shots on the ground.
c) After a lunch break, another pilot with C172 showed up, and we carefully planned a series of air to air shots. This entailed (for me) flying in straight lines at about 500AGL for long periods of time. I was occasionally instructed to turn. We then did a couple of fast approaches to the field, with the photo plane close by as I descended final.
It was scary at first but turned into a lot of fun. Here's some pics: