There's something undeniably appealing about the idea of a famous actor going batsh*t crazy and unleashing hell on a movie set. It's not just because it's interesting to ponder what we think we know about our favourite celebrities, but also because it's kind of glorious to hear about actors - who are almost always pitched to us as being "better than normal folk" - just being people for once, for good or for worse (worse is arguably more fun, though).
So when we hear about something wacky going down on a movie set, as a society of nosey, procrastinating good for nothings, we're innately curious to know that little bit more. Breaking down doesn't always mean going batsh*t crazy, though - the act of breaking down comes in all shapes and sizes, be it anything from a few quiet sobs, to doing backflips on cars in the parking lot until animal control are called in to take you down with a few well-aimed blow darts.
And regardless of their famed commitment to furthering their own brands, there have been times when actors have lost face on the sets of some famous movies - when they decided that, no, I can't take all these privileges any longer, and the best thing to do is to make some sort of scene in front of all these people.