There is a street preacher out in front of the music building at the moment. In and of itself, this is not unusual; the University is an enormous public school, right smack in the middle of Grad School Town, so its public malls tend to attract street preachers. This guy has been out there for at least two and a half hours, ranting at the top of his lungs. He was shouting when I left class at noon (about Halloween -- he's against it), and he was still out there ten minutes ago, still shouting (about homosexuality -- he's against that, too). He'd managed to attract quite an audience, though I think most of the people watching were more interested in seeing if he'd run out of steam any time soon than in anything he had to say.
I have to say, even though I don't care for street preachers and think they're annoying, their sheer stamina is impressive. That guy's been out there for over two hours, just improvising at the top of his lungs. He has neither lost his voice nor run out of things to say. Someday I'd like to find out how these guys do it. I bet it's similar to the way Baluchis and Sufis and Harp singers can sing and/or whirl for hours on end, sort of putting themselves into a trance state.