I have a couple: I was assistant director for the Phantom of the Opera and opening night our chandelier ACTUALLY FELL ON THE AUDIENCE. It was a cool effect where it started out onstage, then we had a rig that flew it out over the audience then at the end of act 1, we flew it back to the stage. It had worked beautifully every other night until opening. Nobody was hurt as it was made of plastic and thin plywood, but sheesh was it terrifying. Another time, I was LD for White Christmas, also running the light board, cause community theatre, and a little boy was playing around front row of the audience and he FELL INTO THE PIT. Again, fortunately it wasn't a deep pit and he was ok. But man, was his scream loud and it scared everyone. Also, I was SM for Wonder of the World and we had a scene where the walls of our huge hotel room set sort of "broke away" from eachother. Pretty much, the crew unhooked some latches on the back and then pulled in certain directions to get it to all come apart. Well, one night (im still not sure why or how) the wall behind the bed (where an actor was sitting) started to fall forward. Fortunately, there was a blackout next and instead of waiting for the fade, I just jumped to it and my SUPER AWESOME ASM DANIEL ran onstage and was able to catch the wall before it hit the actor. And this wasn't just one single flat, no, it was like two big 1'x1' posts connected by a wall. It's like my ASM read my mind. That's how you know you are in sync with your ASM. Another time, I was running crew for a show - moving set pieces, props, costumes, a bunch of everything and a gel frame suddenly fell from the sky. It hit a girls shoulder and gave her a nice gash, but it at least didn't hit her head. That could've been deadly. There was a show in town(I wasn't a part of it, but I heard about it)that was in a really old theatre and about 10 minutes into the childrens show that was happening, the fire curtain just dropped (mind you these things weigh A LOT). Well they found out that it was the ropes going bad and snapping. They had to cancel the show and do maintenance on the theatre before re-opening the show. There was also a dinner theatre in town that had a fire during the show. Not onstage, but somewhere backstage with a water heater. They had to evacuate and get things all aired out before going back in after two hours to finish the show. Oh, theatre.