50/50 effects (where the odds are 50/50 that the mentalist will predict correctly) only matter when something of value is put on the line. In FIFTY 50 , Andrew puts $100 on the line and wagers whether the spectator will pick up the bill with their left or right hand. He always gets it right! This is an anytime, anywhere routine. Grab some paper, pencil, and something to wager, and you're ready to go.