Just that ultimate - Big

The magician shows an envelope and tells the audience that it contains a prediction. He then asks a spectator to select a card from a deck, and to not show him. Next the magician picks up the envelope and pulls out a jumbo face down card saying that on it there is the chosen card. He turns it over and… there are all the 52 cards of the deck printed on it! The audience will start laughing understanding that the magician is joking. As soon as the spectator names his card though, the magician rubs his fingers on the printed prediction, and one card turns face down… it is exactly the chosen one! In fact its face is now visible on the other side of the prediction card. The audience will stop laughing and start clapping!
 

First a funny gag then… amazing magic!