One of the biggest names in the nerdcore rap scene is mc chris (aka. Chris Ward). You may have heard mc chris on shows like Aqua Teen Hunger Force as MC Pee Pants, or heard “Fett’s Vette” in an episode of Sealab 2021 or Zack and Miri Make a Porno. In a Facebook post today, mc chris accused Sealab 2021 co-creator Matt Thompson of sexually assaulting him.

Before breaking out as a nerdcore rapper, Ward was an animator for Williams Street, the production company that makes the vast majority of programming for Adult Swim. He was a writer, performer and production assistant for shows like Sealab 2021 (where he also played Hesh), Aqua Teen Hunger Force and The Brak Show. Though he resigned from Cartoon Network in 2004 to focus on his music career, he remained on good terms with the studio and would occasionally guest on their shows.

However, in a new post, Ward wrote about an incident in 2001 where Matt Thompson, his boss, sexually assaulted him. In addition to co-creating Sealab 2021 with his writing partner, Adam Reed, he also co-created Frisky Dingo, and is an executive producer on Archer, FX’s hit spy spoof.

According to mc chris, he and Thompson would drink together a lot. But this time, at the Clermont Lounge — “which meant we were drinking after drinking,” Ward writes — Thompson grabbed Ward by the hips from behind. Thompson then “humped [him] three times.” When Ward tried to run away, Thompson chased him. Ward said, “You have to stop doing this stuff!” adding “You’re my boss.”

Ward went off to talk with friends while Thompson spoke to Adam Reed about what happened. Ward says Reed “tried to console” him, but warned him as well, saying that when Ward said Thompson was his boss, it “fucks everything up.”

He said he broke down crying:

I cried about a lot of things in that conversation. I cried about what happened. I cried about 9/11 which had just happened a few weeks prior. And I cried about Matt harassing me at work because he thought I was gay. I cried about being [seen] as gay my whole life. Adam said, “I don’t think you’re gay.” And that that was that. The next morning Matt wanted to have breakfast at a restaurant. He said he didn’t remember what happened. And that we couldn’t socialize anymore. I asked if I still had my job. He laughed. “Of course you do,” he said. I quit the following May.

Ward’s inspiration to come out was the recent GQ article where Brendan Fraser talks about being groped by the former president of the Hollywood Foreign Press Association.

Thompson has not yet commented on the allegations.

mc chris’ Facebook post: