Tenkai's hand is wrapped in a handkerchief with only the fore-finger protruding. Now a borrowed half-dollar is balanced on this fore-finger. You hold another half-dollar in your open palm. Now Tenkai will click the balanced coin against the one in your palm and all [y]ou have to do is grab it. But just try and do it! He clicked the coins so fast and often, with the "stooge" really trying to beat him that it developed into a wow laugh.
http://askalexander.org/displaypdf?pid= ... ief%20coin
Now, I seem to recall reading about this little trick somewhere, but can't for the life of me remember where. Pretty sure it wasn't in Bobo, could be in Gardner's Encyclopedia... but I can't find it.
Does anyone know where this can be found in print?