One of the amazing Hand made decks from bob Bromley.
The performer brings out a deck of cards that has a hole right through the centre, as has the card case. The cards are removed and fanned and shuffled. The spectator now puts their finger through the hole in the case, and the deck rests on top of their finger. Suddenly the deck is pushed downwards into the case, thus penetrating the spectators finger. The case now splits open and is removed, leaving the deck hanging on their finger !!!
Bicycle Card Case