MAGIC SIGNS EL DUCO

Description

You display 5 chips (with brass edges) with different ESP symbols.  You sign the back of one chip with a sharpie.
One spectator mentally selects one symbol.  He then writes down this symbol on a piece of paper and puts it in his pocket.
Now, and ONLY NOW, he mentions which symbol he thought of.  He takes the actual chip and puts it in your palm.
Before you turn it over, you ask the spectator to check the backs of the remaining chips on the table.  They are ALL BLANK.
When you turn over the chip in your hand, IT IS THE SIGNED ONE!!  When the paper is checked it will show the same symbol.