Jon Stewart’s going to need a “Moment of Zen” after what happened to him on WWE’s “Monday Night RAW.”

Stewart shocked the wrestling world at SummerSlam on Sunday night when he hit John Cena with a steel chair and helped Seth Rollins win both the WWE World Heavyweight championship and U.S. title.

So why did he do it? Well, the former host of “The Daily Show” couldn’t fathom seeing Cena tie “The Nature Boy” Ric Flair’s record 16 world championships.

"In my mind … THE CHAMP IS FLAIR!!! I wasn't going to let it happen! Not on MY WATCH!" – Jon Stewart #RAW pic.twitter.com/L9nLbDiXVN — WWE (@WWE) August 25, 2015

Flair made a surprise entrance of his own, and he wasn’t particularly happy with Stewart.

Then Cena’s entrance music filled the Barclays Center in Brooklyn as the West Newbury, Mass., native made his way to the ring. And he had a present for Stewart in the form of an Attitude Adjustment.

Stewart was left lying motionless in the ring. He eventually made his way backstage where he received some medical attention.

The #WWE medical staff continues to attend to #JonStewart backstage at #RAW! A photo posted by WWE (@wwe) on Aug 24, 2015 at 7:14pm PDT

By the looks of things, Stewart should come out OK. But he has to be wondering if siding with Rollins was the right thing to do.