I have an idea for a card trick done backwards, but I'm not sure the best way to cover the force required. The idea is to start with a card on the table, face up and tell the spectator, "that is your card," replace the card in the deck, then have them pick a card and it be the card they saw on the table. The problem is that it seems that a force there would be the logical assumption from a spectator. How would I avoid this? I'd like to use the Classic Force or a Spread Cull Force for this trick, just so you know what mechanics I'm thinking of.