I've been using the U.S. quarter Gerti and it's a winner. The DVD is well done with thorough
explanations and extra routines.
For the basic lie detector routine, there really isn't
anything to learn except a routine. The better the routine, the stronger the impact.
I ask
if they have a quarter ( the one time someone didn't, I gave them one to use ) I take a few coins
from my pocket. I have a penny, nickel, dime and 3 quarters ( one of them is Gerti ).
My
gimmick has my initials pre-signed. When I take the change from my pocket ( I simply make an
adjustment so my initials aren't showing.
I have them initial their quarter and then I
pretend to initial mine. They take both quarters and I turn my back, holding out my hand for them to
place one of the coins into my hand.
That's it. You know which coin you have. The rest is
acting/routining.
People are gobsmacked that you can know which quarter is where based on
their tells. I'll carry this with me, always!