Jon Stewart hosted the WWE SummerSlam event this weekend at the Barclays Center in Brooklyn, N.Y. Not satisfied with only hosting the show, Stewart entered the ring during the Seth Rollins vs. John Cena fight — and helped Rollins gain the advantage in the fight.

Stewart came into the ring with a folding chair and gave Cena a huge hit in the stomach, making him dizzy for a few seconds — seconds that helped Rollins get a grip on himself. Stewart quickly got out of the ring, but left the chair with Rollins. Rollins placed Cena in a hold, winning the fight and the WWE World Heavyweight Championship and United States Championship at once.

Stewart and Rollins have been involved in a spat for a last few weeks, criticizing each other’s work and even threatening each other on YouTube.

Stewart has been heavily criticized by WWE fans on Twitter for his antics at SummerSlam.