Don't know if this is the right section of the Forum, but I feel this particular routine deserves a mention right here.
But that's only my humble opinion.
It's an effect, yet could be a "gamble or bar bet".

I came across it when viewing this great YouTube post ... "Top 5 Razor Wallet Effects".
https://www.youtube.com/watch?v=5b8sd-HQa8U

It completely fooled me.
But when I searched to purchase this, I saw that it should not be repeated to the same spectator.
Then the method hit me straight away ... but it did completely fool me when I first saw it.

Even knowing the method, it is still a great routine.
Let me know what you think ...
https://www.youtube.com/watch?v=X0IW34DMMEM

WulfieSmith

This is def a fun little bar bet style routine. I like how organic it is with presenting it when the bill comes at a bar or resturant. Great presentation style for the circumstances.

AlvinMaker,
If you liked this, then I am sure you would love 50:50 Fantasia by Ian Rowland.

You can still get it for free from his website.
https://www.ianrowland.com/magic
Pure genious. Highly recommended!

A 50:50 bet.
You bet, they guess, you win.
No props or moves, just your words, your mind, and a secret.

WulfieSmith