Rob Ziekman Karate 1996 by Leo Smetsers

The magician shows a deck of cards to all observers and shuffles the cards. One of the observers chooses a card and puts it randomly back in the deck. Then you as a magician talk about your old hobby, karate. You show a karate headband, which you start wearing. Because of this headband, you tell them, you receive special magician powers. When you hit the deck of cards with your fist, you cut the observer's card in two and shoot it in the air. Spectators are astounded!