Yes, its basically a self working trick that my non magic friend like to pull out of the bag occasionally when I start performing for people, surprisingly it goes down very well with spectators and I have to pull their attention back with the Ambitious Card, OOTW, Erdanase Aces and others.
Simple effects can stun spectators and you really do have to have pleanty behind to come back at them
At Christmas I saw a bloody good mentalism trick being run by a father and daughter, one away, one predicting

After the second time, I got it, and then did a different one which threw them and the other folks watching.
The moral is, folk are getting more attuned to magic. Secrets are revealled every day on TV. You can't always be aware of what people might know, but you can be ready to go one step in front if you have to

Tenko.
Yorkshire, UK
Male, 55yrs old, Retired.
"I don't believe it" Luke Skywalker
"That is why you fail" Yoda