Detour de force

From the man who brought us Twisted Sisters, John Bannon has done it again with a diabolical double prediction unlike any other.

The  performer writes down two predictions, each on a separate piece of  paper, and places them on the table in full view. He then begins dealing  cards into a face-up pile, allowing the spectator to simply tell him to  stop at any point. This selection is placed aside with one of the  predictions.

The performer then reveals that the deck he's using  contains marked cards. The marks aren't meant to be secret, though, as  each card is boldly labeled!
The deck is shuffled and the performer  again deals the cards, this time into a face-down pile. The second  spectator also simply tells him when to stop dealing and this selection  is also placed aside with the other prediction.

Both predictions  are now turned over to reveal...they are wrong!? The predictions don't  match the cards! The performer explains that the cards are marked, but  not correctly-the printed marks don't match the faces. When the first  face-up selection is turned over, it's mark matches the first prediction  and when the second face-down selection is turned face-up, it also  matches the second prediction exactly!