The problem with the effect is the following

Three spectators are asked to help you

On these DVDs

The performer explains this will happen a total of three times in all and when the final of the three randomly selected seated audience members has done his or her mixing the cards are replaced by them into the box

Wayne Fox created the original Chipswitch

LS Flat Harmonica Cup | Leo Smetsers Mavresis The problem with the effectThe Flat Harmonica Chop Cup A New Revolution by Leo Smetsers! Leo Smetsers has enjoyed great success for years with his renowned Harmonica Chop Cup. Magicians all over the world have embraced this clever and practical tool and thousands of units have been sold. But Leo wouldn't be Leo if he didn't keep innovating The idea for this new version actually began a decade ago. When Leo first introduced the original cup, Dave Loosley said to him: "Why not