This does bring to mind a story I was told once from my old summer stock. Small truss is being loaded into the audience box seats. Two guys go to the landing above, lower it down with a rope, two guys below catch it and release the rope. The two guys up top are Crusty Old Stagehand and Fresh Faced Intern. Intern says, "Wow, this truss is really heavy, I don't think I'm comfortable lowering this by myself. I could really use a hand, Crusty." Crusty looks up from his chair and says, "Quit being such a *****! Get the sand out of your vagina and be a man!" Intern, being fresh faced and slightly afraid of Crusty, attempts to lower the truss by himself. Truss is, indeed heavy, and the rope flies through his hands. Truss goes crashing to the ground 30' below, taking out several rows of seats. Intern gets in trouble.
And that's how accidents happen.