At last I now shift my focus to funny incidents that actually happened in churches I attended or pastored.
(1) I was a young teenager and Pastor B was preaching on John the Baptist. Now Pastor B was a fine preacher, but he had no sense of humor. So I was shocked when in the midst of his sermon he blurted, "And Jordan baptized Jesus in the John." Unaware of what he had just said, he continued as if nothing unusual had happened. What made this even more hysterical to me is the fact that the congregation just sat there stone-faced after his blooper. I thought to myself, "Haven't they been listening?"
(2) Then about a year later Pastor B was preaching on King Saul's jealousy of David. At one point in his sermon he exclaimed, "And there David stood in the gates of the sanctuary, breathless and pantless!" Once again, he moved on to his next point, unaware of his blooper; and once again, the congregation just sat there, stone-faced. After about 5 minutes a young man looked back in my direction with a wicked grin on his face. I thought to myself, "Well, at least he was listening and heard the blooper!"
Later when I became a pastor myself, my diabolical mind nurtured this fantasy. If and when I got the chance to be a guest preacher in a church that didn't really know me, it would be fun to preach a sermon that contained all the best bloopers preachers have committed and to move on as if I was oblivious to what I just said. The key would be to make those bloopers seem a natural byproduct of my sermon's flow of thought and then to move on, so that the congregation thought I was unaware of any of these bloopers and felt constrained to be polite in their muted reaction.