Originally posted by MarkE19
I would think that the footage was created by doing the following:
Film the scene with the different people in 2 different takes with the camera in a fixed position.
Syncronise the 2 clips together and fade the scene with the boy in and then out to make him appear/disappear.
Because the camera never moves, the table etc only appear the once.
The above is only a guess, but if I was trying to do a similar thing that would be the way I would attempt it.
I've probably not explained it very well, but I think I understand what I mean, I think