I went and listened to the Dean Primal Scream. (Also listened to various hilarious dance remixes.)
As a literary work, it's an interesting take on Robert Redford's "The Candidate". I mean, here's a punch-drunk disappointed guy having fun, to some degree at his own expense. I mean, "Yeaaaauahugh!" is not exactly the sound of a guy taking himself too seriously.
As usual, the press has over-reacted. Yes, it's funny. No, it's not the sound of an unhinged guy. It's the sound of a straight-laced New Englander playing up to the camera on his off-night.
(I mean, the Congregationalists are not the place to go for speaking in tongues.)