During a comedy set on Sunday night, comedian Steve Brown was attacked by a crazed fan who used a mic stand as a weapon against him onstage, leading to an injury.

Brown was performing at The Comedy House South Carolina when an audience member from the front row jumped on the stage and attacked him. The attack was caught on video by another person in the audience.

The footage shows Brown’s attacker jumping on stage, throwing punches at Brown, then swinging the microphone stand around. As something flies from the stand into the audience, the attacker proceeds to violently swing the stand at Brown, eventually hitting the comedian’s arm with it (see picture below).

Brown’s attacker also used a wooden stool as a weapon, hurling it at Brown, before “a few people at the club had the presence of mind to subdue the guy, who was taken outside,” according to an account of the incident on TMZ.

“The Richland County Sheriff’s Dept. responded to the club, and has opened an investigation. So far, no arrests,” TMZ reports.

The reason for the attack is unclear, but Brown said the attack was “unprovoked” in an Instagram message about the incident. He wrote:“First off let me start by saying Thanks for the calls and messages from friends, fans and my family. With that being said, let me say this. This unprovoked attacked that happened to me tonight is a reminder of why these comedy clubs should have well equipped PROFESSIONAL security to protect us entertainers who bring their club so much money. I thank God for looking out for me and giving my old ass the ability to Bob and weave because this could have ended in [a] horrible way.”

Brown shared a picture of his injury, and blames the club for lack of security.

On Monday, Brown said he is now able to laugh at the incident, writing on Instagram: “As a comic you have to some how find humor in tragedy…”