Harvey Walden has worked with a lot of wannabeens on "Celebrity Fit Club" -- but there's one guy in particular he says belongs on Celebrity "Piece of S**t" Club.
The fatty in question: "Dustin Screech Dumb Ass Diamond," who Harvey despises soooo much, he threatened to "rip his head off and fill his throat with low fat yogurt."
Someone get him some Yoplait!
Fit Club Trainer: I'll Rip Screech's Head Off
10/14/2009 10:32 AM PDT BY TMZ STAFF
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