By Olivia Bahou
Updated Oct 24, 2017 @ 4:00 pm

Matt Damon and Julianne Moore play a married couple in the upcoming George Clooney-directed Suburbicon, and they have a rough sex scene together in the film. According to Damon, it didn’t exactly go according to plan.

The actors used a ping-pong paddle to make the scene look authentic, but Damon wound up hurting himself in the process. “We had a good ping-pong scene together,” he told Entertainment Tonight. “That was not dull at all.”

“I actually bruised myself,” he said, admitting that he caused one of his butt cheeks to be “completely discolored.”

Matt Damon and Julianne Moore
Credit: Kevin Winter/Getty Images

“We realized the way the shot was, it looked like it was hitting her if I hit myself. And so I really let myself have it. I was spanking myself,” Damon joked. “He’d hit and then I’d yell,” Moore added.

Credit: Hilary Bronwyn Gayle/Paramount Pictures

“I like it rough. I didn’t realize how rough I like it,” the actor joked.

His wife Luciana Barroso, though, was a little freaked out by his injury.

“When she saw my butt, my cheek, she was alarmed. And then I obviously looked and I'm like, 'Oh, God. Oh, God. Oh, that's from—that was just from work, honey,” Damon said.

Catch his and Moore's scene in Suburbicon, in theaters Oct. 27.