by NessFest » Mar 2nd, '11, 18:32
It's not part of Jim's original routine, but was developed separately and is unreleased. Having said that, there are several obvious possibilities as to method. It seems to me that there's at least one good pointer in the video, of course I could be wrong.
I use this in a much longer version and have backstories for all the people in the photographs. I've found that the more story you add, the better it plays. In my act it currently runs about 10 minutes.