I was being heckled by someone who was too thick to take the hint, and was annoying the audience rather more than he was annoying me.

As he was spoiling the entertainment for everyone else, I looked him in the eye and said: 'We call people like you baiters - and I reckon you're a master at it!'.

The rest of the audience got the joke straight away, but he took a few moments to realise what I had said. He shut up after that...