Dustin Diamond’s post–Saved by the Bell career has been such a pileup of bad decisions that you have to wonder if it’s actually some sort of Andy Kaufman–esque performance art. The reality-TV fat camp. Going on Howard Stern to solicit donations to pay his mortgage. Making humanity’s least-anticipated porn tape. If he’d been cast as Shaggy in the Scooby-Doo movies, as he’d fervently hoped, would any of this sorry tale have unspooled? After watching him skillfully alienate everyone on Celebrity Fit Club, you’d have to answer, yes, most likely. But rubbernecking is best in person, which is why, all personality challenges aside, Diamond’s a natural for the dark world of standup comedy. You just can’t experience the full blast of his weirdness at a remove.

DIAMOND PERFORMS AT 8:30 P.M. AND 10:30 P.M. AT ALL STARS COMEDY CLUB, 2317 WILSON BLVD., ARLINGTON. $12. (703) 739-7377.