I have one of them...
One of my first jobs was an Usher at The Lounge Cinema in Leeds in the early 80s.
I can't remember the film (might have been 'name of the rose') but in those days you still had an Intermission.
It was the first time I had to take the Ice Cream tray down the front.
There is a little lectern just in front of the screen.
I had me tray and my instructions.
"Just go down the front a minute before the Intermission, put tray down. Serve"
I got there, put it down, film stops, lights come up and curtain closes.
I was stood too far back so these HUGE curtains whacked into me and I disappeared in front of a full house who despite the seriousness of the film and this being Leeds.. all pissed themselves laughing.
This being Leeds then every single bloke who came up to me in the queue was a variation of ;
"Two Mivvis, Choc-ice. Kiaora for the wife... bet you feel a right cunt don't you mate?"
I also fell down the trapdoor during a production of The Rocky Horror Show at Leeds Grand Theatre which is equally bad.