Imagine asking your spectator to borrow a bill. You pull out a counterfeit money detector. Your spectator sees the UV light hitting their bill. The UV light morphs into a written sign indicating the bill is FAKE. You act like you're putting their money away while the audience is soaked in the funny moment. When you conclude the joke and are ready to do something with their bill, voila, it's already been switched to a prepared bill that will blow their mind away. A practical tool that hides during the laughter, allowing you to openly switch a bill in front of your spectators.
Get it now, worldwide.