I used to do this trick but using the four aces on the bottom an the top cards were 10-J-Q-K of the suit of the bottom ace. So that way you end up with a Royal Flush. I also show all of the hands and pretend to have made a mistake but show the suprise ending. This trick I believe was first written up in Scarne Card Magic.
When I tried this trick on my brother he had a look through the four other hands and one of them got a royal flush! So sadly the trick kinda didn't work... Keep up the good work mismag.