In my mumming days, performing in bizarre costumes round packed pubs in the festive season, we naturally got quite a bit of heckling, most of it very good natured. And often, those that heckled most would donate generously to the charity we were collecting for.

But occasionally, there would appear a nasty, aggressive heckler. It was always best to just totally ignore those as much as possible; no 'witty riposte' would ever have any positive effect.