It is a sucker type effect where a card is selected
Balance: You can balance your marker in impossible way
Though the plot of Triumph - cards mixed face-up and face-down magically righting themselves while at the same time revealing a selected card - was almost certainly not new at the time
concepts and techniques about lapping switches
Harry Loranye's Apocalypse #2 (6-10) - Book Kids Show and Balloon Performer It is a sucker typeBACK IN PRINT! Volumes 6 10 Spanning January 1983 December 1987 720 Jam Packed Pages Plus 20 Pages Of Indexes! Over 265 Card Effects, over 100 Coin Effects, over 100 Other Items, Plus Articles and Editorials! Contributors Include Ed Marlo, Ken Krenzel, David Regal, J. K. Hartman, Michael Ammar, Larry Becker, Mike Bornstein, Tom Craven, Dan Garrett, Phil Goldstein, Larry Jennings, Jeff McBride, Jay Marshall, Juan Tamariz, Meir Yedid, Ascanio, Jeff