Just thought of another one. Not my malfunction, but

Years ago when I was in a pipe band we had just finished doing a mile long parade and at the end of it we were all sitting down on the curb of the sidewalk, exhausted and thirsty. I got up to get a drink of water and on the way back I noticed one of the pipers "sitting like a man" busily talking to another piper and there he was in all his glory doing the full monty. I knew him well so I went over and whispered "I see your bagpipe is exposed" then laughed and walk on. Many of the pipers dressed regimental when doing summer parades and there were always 1 or 2 that would forget what they were (or weren't) wearing