As an usher in a large community theater, I can say that things aren't too tough. When weird situations arise, it generally -is- the house manager who takes care of things, since we ushers are all kids between twelve and eighteen. There are, of course, sticky situations that we take care of, sometimes in the wrong manner. xD For instance:
The theatre is all stadium-style seating, so everyone, save the front row sides and orchestra, is looking down on the stage. The center orchestra is twelve rows, and at the top, there is a wide walkway with a nine-row balcony above it. About three years ago, an older lady fell nearly all the way from the top of the orchestra, down to the stage, and into one of the monitors, halfway on the stage, halfway off. While some ushers stared and some ran down to her, one kid stood above her and said:
"Excuse me, ma'am, but we're going to have to ask you to get off the stage."
-Shakes head-
"'But do you really mean, sir,' said Peter, 'that there could be other worlds --all over the place, just round the corner-- like that?'
'Nothing is more probable,' said the Professor..."
-The Lion, the Witch, and the Wardrobe