I thought it was about time we resurrected this thread - especially after what happened to me on Sunday.
For a change I was playing guitar rather than bass, and our 2nd pianist was on. She looks to me for a lead and follows what I do. I guess that was the first mistake.
Second mistake was trying to keep singing all the verses of "O God of burning cleansing flame". I'm not that familiar with the verses after the 2nd one and I realised that I had lost my place in the music after playing a wrong chord in a particularly bad place. So I was concentrating on trying to get back to the right place and for some reason thought - Oh yes, we're going for the ending here - big splash, big ending, rall on the last repeat of "send the fire today".
So we all stopped. Guitar. Piano. Bass. Drums. Clarinet. Congregation. And then I'm aware that everyone's looking at me.
"I don't know how many verses you've got in your music" says the minister. "But we've all got another one!"
Yes, I had successfully pulled the congregation up one verse too soon.

How embarrassing.
Mind you, afterwards people said that at first they all thought they must be wrong because that's the first time they can remember me making a mistake like that and I looked as though I knew what I was doing, so they all thought I was right and they were wrong. For a couple of seconds until realisation set in ...