Once playing melodeon with Eric the Viking somehow the nails that hold the bellows together had come out (or been sabotarged)and I ended up with a lump of unconnected squeeze box in each hand. Another time playing with a band and the singer decided we should start playing behind the curtains and he would signal the stage manager to open the curtains as he was about to start singing. All went well till the electrically driven curtains billowed out taking the two speakers with them and the singer appeared running from one side of the stage to the other trying to catch them. We still played on but couldn't help laughing like hell along with the audience.
Just about four months months ago we were playing for a wedding ceilidh while in the next room Sho-waddi-waddi were playing for a birthday. I had just switched on my radio mike when through our PA came the announcement "Ladies and Gentlemen for your entertainment tonight we've got Sho-Waddi-Waddi so I just answered through my mike "and if you don't want to see them you can join in a ceilidg next door