Originally posted by Jacques:
i've heard about the "eight card brainwave" by Franck Garcia which has inspired some routines like "twisted sisters".
i'm curious about what was the effect of this premise routine
In addition to it being a Nick Trost routine, not Frank Garcia, you also seem to be confusing it with Phil Goldstein's B'Wave, which was the predecessor to Twisted Sisters.
B'Wave, if that is what you are interested in, is a small packet version of Brainwave in which you predict which queen will be selected by the spectator. In addition to that queen being reversed in the packet, you also show that it has a different back than the other three cards AND that the other three cards are actually blank-faced.