("Drop Job" is the term I use for taking an element from one picture and putting it into another picture in such a way that the element looks like it was always in the second picture.)
This is the third time I've taken pictures during a shoot with the express purpose of trying to make a mirror show something different than what was actually in front of it.
First attempt: Miserable failure.
Second Attempt: Almost worked, but technical problems didn't allow a final image I wanted to let anybody see.
The lighting isn't good, and that's one of the things I need to address next time. But the drop job, to me, looks pretty good and I think that with one more shot I can just about nail this. Comments on technique are welcome, as are any tips you'd care to share on planning and executing shots for this sort of thing. I can share the lessons I've learned if anybody wants to hear about them.