A spectator freely selects any card from the deck (no force). After having the card signed across the face or the back, the magician takes it from the spectator and tears the middle from the card. Thus, ending up with a cardboard ring. Then, without pausing, you immediately link the card onto your belt loop. You rotate the card all around proving that there are no tears in the edges of the card an you tug on the belt loop showing that it too is completely intact. Here's the best part... you have to tear the spectator's card to remove it from your belt loop.