Throwing beer, you're better off without him. Sounds like a prat.

If you're going to be that thin skinned and volatile - you're not really safe out on your own.

Its sounds to sense you get the odd song buggered up in some way by the audience. The guy sounds like total moron. Mostly its someone who just gets it wrong - thinks he knows the song better than you, thinks he's god's gift to humour, thinks he knows a brilliant accompaniment.

Nick Fenwick - the Geordie used to have a battery of amusing insults for hecklers and act violators. When you're pro - you learn to deal with these situations as well as you can - without unpleasantness. if you're visiting somewhere strange you have to be careful - you might be traumatising the local care in the community basketcase.

either way, throwers of beer are the villains of the piece.