Great advice Scrutin. You're right you know. It's not the end of the world if something goes wrong. In fact it sometimes actually breaks the ice a little with the audience especially if you can make a joke from it.
I have a story:
I went to see Jeff Buckley, God rest his soul:), many years ago and towards the end of a really energetic and moving part of a song called Grace, as it was building up to an amazing grand finale he fell over a monitor and crashed to the floor. I'm not kidding, he did! The band stopped playing and went over to him to check he was OK. You could have heard a pin drop! He sort of bounced up very quickly after a few seconds and kind of dusted himself down and said this:
'Apparently, it's supposed to be character building making an idiot out of yourself in front of 1000's of people!'
When the giggles had died down he did the whole song again and brought the house down!
It might not seem that funny a line now, but at the time it was a top dollar.
by the way, we're a duo so people are focusing on me unfortunately:)