A man in the pub was telling my brother the other day, who happened to mention that I was into magic, about a magician this guy saw many years ago.
This man is the heckler of the story. The magician was using a stacked deck for an effect and this man, being a clever bum, shouts out how it is done halfways through the trick. He does a similar heckle on the next trick, and the next. After a brief break, the magician comes back onto the stage and says "For this trick, I need a volunteer. You sir, seem to know a good deal about magic, perhaps you could assist me?"
Heckler man is taken aback, but gets up on stage. He admitted to my brother he wasn't just showing off, he was a bit drunk and genuinely just wanted to embarass this guy.
The magician has him take out a five pound note from his pocket, hold it above his head, tear it up and drop it into an ashtray. He then says "Now, you're so f$%&!ing clever, put that back together!" Heckler walks off stage, ashamed.
Not exactly the best way to deal with it, but the guy still has the fiver framed, still in pieces, at his home as a reminder to be more polite. Never heckled again
Long story, but it amused me when bro told me today!