The Butterfly Effect - a psychological experiment in free will. Your spectator stops you dealing through the cards whenever they like - no force. That card leads to a second card which then leads to a third. Three completely random cards...or are they? You can now go on to show three remarkable predictions in a row proving that free will may not be as free as it sounds. This is a completely self-working, self-contained card trick. There is ZERO slight of hand and nothing to memorise. If you can deal cards to the table - you can do The Butterfly Effect. It's a regular deck and it resets instantly - set it up once and you need never think about it again. The Butterfly Effect - Modern mentalism that anyone can perform.