LOOK AT THAT .GIF... It tells the whole story! Rich Marotta made something wonderful.
What was once simple a gag is now a deeply fooling effect:
● You stick a quarter to your forehead.
● Act like it's the greatest thing in the world. In fact, bang your head like Brian does in that Scam School video. Ask how people think it's done.
● Then you reveal the "true" method: When you peel the quarter off your forehead with one hand and show the back of the quarter... it has an inch-and-a-half-long nail welded to the back of it!
● The nailed quarter is immediately examinable.
Effects like this used to require some clever sleight of hand to switch in the nailed quarter, but not anymore. This clever locking gimmick can be handed out for examination by your audience. The coin artisans at Penguin Magic manufacture this precision-made gaff to be durable, deceptive, and easy to use. Made from real currency (don't tell the feds), this gimmick will last you a lifetime.
(Seriously. It really is as clean as it looks here.)