A good humorous prank is one that leaves the person on which the prank was played confused, but unhurt and not embarrassed.
In this setup two sets of twins were used, one of each posed as a couple and asked a passerby to take their photo. As a moving van passed by they disappeared and the other couple set up behind the would-be photographer.
A funny prank that left quite a few people confused and thinking maybe there was a clinching the matrix.