you". When using this force, know it has a weakness that a lot of other forces don't have. It's not 100% reliable. Always make sure you have a way out. I've found using the force card as a key card in these situations works quite well. And in that case one of my favorite reveals is to show 4 cards that are clearly not theirs (but tell them you think one of them is) place them face down (one of them is secretly their card, but you don't show that one), have them pick their card using the magicians choice. The fact that one of the 4 cards has changed into theirs, and that it's the one they picked out of 4 cards makes the spectator kinda forget about the fact that they couldn't shuffle (they can't because it might displace the key card). You know, if you are going to force a card on them you can get them to shuffle before hand. They can shuffle it and after they give it back just casually find the card and control it to the top, whilst talking to misdirect. Its important you let them shuffle, it puts them off guard.