that ending is amazing. He doesnt just say all those random cards turn into four Jacks but he has the spectator pick a 'random card' even tho at this point they are already all Jacks. Then he makes it seem like he turned all the cards into the four of a kind of the card that the spectator selected. In the spectators mind they feel as tho they couldve selected any of the four random card and he wouldve turned the rest into its four of a kind as well. Very different from not having a card selected and just saying "look they all changed"
