There are dozens of "Reveal" card plots out there, but for whatever reason, this is the one that
spectators seemed to have responded to the best. I believe the reason is that IF you wait one day,
for the "bruise" to become a bit indistinct, less precise, they'll look much more like a REAL
bruise, and when that happens, your spectators believe that there was no way you could make your
bruise actually reflect the value of your playing card.
I think you have to be clever in
how you apply these though. It's best to have some bruising around the chosen card number , because
many bruises are spread across a large area of skin in indistinct ways. But have your spectator
press firmly on your covered arm first, and then WAIT a few mins,do 1 or 2 other tricks to give your
skin time to "Bruise", then go back and do your reveal. It'll be much more potent.