There isn't really any explaining it. I got hit pretty hard a couple months ago here and I was no less restrained in my catalogue of overblown language. There's just something about great art that gets us, both exhausts and excites us. It's what keeps us going back to the theater or the movies or whatever. We want to be so struck.
Crouch does bring up another interesting point about theater today: it bleeds. A lot of theater works to incorporate every medium available, to incorporate into it every technology, but when it comes down to it, the difference is life and blood. Whenever people talk about 3-D movies I always say, "Like a play?" This rarely gets a laugh. Oh well.
(Hat tip: LRN)