You show a small pin needle as you know it from a bulletin board. A (in this case wooden) cap with a sharp metal needle attached to it.
You take the pin between your thumb and forefinger and you slowly pinch your thumb and forefinger together, slowly the audience sees the needle going into your thumb untill only the wooden part of the skewer is left between both fingers. You remove your index finger and the pin has been pushed completely in your thumb. Then you take out the pin, show the red dot on your thumb where the pin has penetrated the skin and hand out the pin to your audience for examination.
Perfect for Halloween or other bizarre magical situations.
You will receive everything you need including online video-instructions in English.