To an observer, it looks like this. The magician is blindfolded and faces a wall while his confederate goes around the audience, asking people to place on a tray any random items that they happen to be carrying with them. Coins, eyeglasses, wrist watches, credit cards--anything at all. Audience members also have the option to select playing cards from a deck.Further details and explanation at Boing Boing.
The confederate then holds up each item silently. No apparent way exists for the confederate to communicate with the magician, but somehow, the magician knows all.
21 May 2014
"Mind-reading" magic tricks explained