The Magic Riffle card trick is one of those interesting Impromptu series that prove to be quite entertaining when played. As you start practicing this trick, it may seem a bit weird or difficult but the more you practice, the better grip you are likely to develop. The player of this trick does shuffling of the deck and then riffles through it. At the same time, an observer or spectator says STOP as the end of the cards is reached. Right at that point, the player separates the deck and without looking, shows the card to the spectator and then guesses it afterwards.
Repeat the same procedure, thus removing all the cards above 8 until you are left with one single card other then the 8 of diamonds. On turning it, you will be surprised to know that it is the Queen of Hearts.