WITNESS:
From Ellusionist and acclaimed performer Wayne Houchin (creator of Sinful, the signed coin through soda can) comes Stigmata.

The spectator thinks of anything. A name. A number. A memory. With the thought in mind, the spectator squeezes your wrist. Tightly.

When the spectator releases, red marks appear on your arm where they were squeezing. These marks of blood under the skin then slowly, visually, clearly re-arrange themselves into the shape of the spectator's selection. Seeing is believing.