" With a deck switch

If you have read his books

To ensure longevity of use

and court cards display attention to detail never before achieved

the secret gimmick hides in plain sight giving you access to your spectator's information

Verdrehte Flaschen | U.F. Grant JC " With a deck switchYou and a spectator each hold a bottle and a tube. You ask the spectator to imitate you as best they can. You place the bottle on your hand and place the tube over it. Then you turn the tubes over, and over again, and maybe do the whole thing again. If the tubes are then lifted up, your bottle will be the right way up and the spectator's bottle will be upside down. This will now be repeated, of course. Bottles in the tubes and turned over and over