Checksum by Mark Lemon

A surefire pin reveal with a sneaky secret. Someone creates a unique 4 digit pin. Free choice. The secret behind Checksum allows you to read their mind and know that number, every. Single. Time. Checksum uses no magic apps, no toxic force, and the spectator’s borrowed phone. It’s based on a stupidly simple math principle that anyone can do. If you can do this in your head... 6-3 = 3, you can do this effect. Check it out here: