A jumbo prediction card lies face down on the table. The magician takes a regular-size deck of playing cards and deals off the cards, one by one, face down on to the table, until a spectator says to stop.
When stopped, that card and the jumbo card are turned face up and are found to be the same!
All the other cards in the deck are seen to be different.
Supplied with the special deck of cards, jumbo card, and instructions.
Easy to do!