Decide - Manipulate The Mind of Anyone
You show 2 envelopes and explain that one contains a note of high value, for example a £20 note, and the other contains a worthless piece of paper. You hand them one and keep the other and give them 3 chances to change their mind by swapping or staying with their choice. No matter what they decide - you end up with the money. Everything is examinable.
Learn this creation from Cavan's close up repertoire now for just £3.