Jon Stewart and his son Nathan looked like they had a ball during their goofy appearances at last night's WWE blowout at the Barclays Center, though calling what Stewart did "hosting" is a little bit of a stretch. Apart from an introductory speech where the just-retired Daily Show host brought out mangler-turned-lovable oaf Mick Foley and joked, "I've spent the last 16 years talking about politics—it's nice to be back in reality," Stewart's appearances consisted of a handful of skits shoehorned into 3 hours and 45 minutes of violent acrobatics.

Sporting a white beard, grown-out white hair, a T-shirt and a blazer, Stewart certainly looked the part of a guy who's cutting loose and living his childhood dream. In a recurring gag, he and his son roamed around backstage collecting autographs, with the elder Stewart asking wrestlers not to personalize them, and Nathan at one point stage-whispering, "Daddy's unemployed." Elsewhere, Stewart waxed poetic about the Undertaker's loss to Brock "The Beast Incarnate" Lesnar, speaking as a sort of stand-in for wrestling fans at large who felt betrayed when the powers that be at WWE decided to end Taker's 21-Wrestlemania win streak at the meaty hands of Lesnar.

The high point of Stewart's appearance, and one that may signal future involvement in the pro wrestling franchise, involved no talking. It came 20-some minutes into a grinding title match between good guy John Cena and villain Seth Rollins, who Stewart feuded with earlier this year, and who the Brooklyn crowd cheered, by the way. Both wrestlers were half-dead after dozens of trips into the air and down to the mat, and several near-three-counts on either side. Cena, supposedly a record-holder for most Make A Wish Foundation appearances of any celebrity, had just missed making a pin-fall because the ref had been knocked out of the ring. He and Rollins pulled themselves to their feet with excruciating slowness and were both standing like zombies—a point where, by wrestling logic, either party could win. That's when Stewart ran into the ring with a steel chair and, after a long moment of slapstick indecision, gave Cena a chair to the gut, then threw the weapon down.

He fled the scene as Rollins slammed Cena onto the chair for a final pin. A "stunned" announcer Michael Cole remarked, "Jon Stewart has gone from Daily Show host to SummerSlam criminal."

The surprise end was what's called a heel turn, where a guy universally considered to be a force of good—that's Stewart—does something surprising and dastardly that is all the worse because of his recent virtue. In wrestling teleology, one doesn't just suddenly make peace with the villain and brutally sabotage the good guy without explanation. It's pure speculation, but the way these things go, it's a good bet wrestling fans will be seeing more of Stewart, perhaps as early as tonight's Monday Night Raw. He's trying to keep the fun streak alive!