Many years ago at a basketball game, my radio pal dashed off to the bathroom after the halftime stuff but before the second half started.
"Put these on," he said, handing me the headphones, "and listen for the intro. Then just ad lib until I get back. Gotta go pee."
OK, no problem. I put them on, listened and the music came on for the intro. Then the music stopped and I mumbled something like "Welcome back to ..." when I heard the recorded "And nowwwww, back to the ..." intro voice.
"Well, shirt."
I ALMOST DIED.
Fortunately, the mic either wasn't on, I didn't say it loud enough or one of the probably 14 people listening to the game didn't hear it or call in to complain if they did. I told my buddy about it after he returned, during a break. He laughed.
Every mic is hot. Always.