An embarrassing moment happened to me and a group I was playing with ( that gives my age away lol) many years ago.
I hadn't got into folk then and was doing pop/rock & roll.
We were all still at school and were all in the same year. One of the guys owned the amplifiers that we used. We were all electric at that time.
This guy used to set up the stage and connect all the amps etc.
We were playing at a local working mens club and were in the middle of of song - That'll be the Day - when as I was singing I leaned close to the mike stand and my steel guitar strings touched the stand.
There was a huge bang and all the lights went out and a strong smell of smoke. A bit scary at the time but embarrassing and funny afterwards.
We never got asked back and we got an electrician to sort things out and one of the parents set up the gear on future gigs.