Not exactly a collage, but I did this to try to get the juices flowing:
Since it was done on a blue screen, I can put them just about anywhere I like.
I'm thinking about doing a sample composite for each of the competitors in the CFF event I did this weekend. Some actual show stuff and some posed stuff. I'll have to work on a few before I decide how soon I can roll out something like that. It may be something that I add to their galleries later, much much later.