Not a stage per se… but here goes!
I was working on the floor crew as a studio camera op for a TV station in a mid-60’s size TV market, meaning not quite the “big time” but close. Prior to one Sunday night news cast, the director told me to go home and put on a suit. I asked why… he said that the weather guy called in sick so I had to do weather. I said, “I’ve never done weather”. He said, “All you have to do is run your yap for two minutes and 30 seconds. Should be easy for you, of all people!”
Thus emboldened, I went home and put on my kelly green leisure suit. This was in 1976, when such monstrosities were in fashion. Came back to the station, went to the weather office, ripped some copy off of the weather teletype and grabbed the weather map camera card from the night before. I moved the acetate cell with all the “H’s” and “L’s” a bit from the left to the right, since that is generally how the weather moves. I was all set!
Got out to the studio, plunked my weather map onto the camera card stand and then ran my camera for the beginning of the show as usual. When it came time for weather I locked down my camera on a wide shot of the chroma key screen, took my place and introduced myself to the audience. I could see the weather map keyed behind me as I gazed into the teleprompter. I began to gesture at the big red “H” over my right shoulder. But my hand went to the left. This totally threw me so I did it again. And again. What I didn’t realize right off was that being on TV was NOT like looking in a mirror. Everything was backwards, left was right, right was left! I stared at myself on the prompter. The folks at home saw me staring at the camera like a deer in the headlights of an oncoming car. I could hear the director and audio guy howling with laughter in the not-so-soundproof control room. I completely locked up. They let me die live on camera for what seemed like forever then went to a commercial. When we got out of commercial they were still laughing but I was standing behind my camera where I belonged. The show went on even though the anchor dude was still snickering.
This was back in the day when videotape was 2" wide and real expensive so we rarely recorded our newscasts, for which I am still thankful. It was some small comfort to know that this was a Sunday night 10 pm news cast so our audience was likely about 10 people and maybe a dog.
I never got asked to do weather again.