You Must Be Joking (by Terry Seabooke)

The Effect:

• A playing card with a prediction is handed to a helper and asked not to look at it yet.
• A second helper selects ANY card out of the deck.
• The first helper looks at the prediction and reads it out loud (not a joker).
• The selected card is NOT a Joker, but the entire deck is spread out to find the deck is all JOKERS!