Luke Bryan is one of modern country music’s biggest album sellers and also one of its biggest live draws. However, things went wrong at a concert where Bryan was performing in Nashville, Tennessee this week.

A fan making crude gestures in the front row quickly learned that Bryan wasn’t going to tolerate the behavior and he decided to deal with it himself.

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Bryan was performing at the Charlie Daniels all-star Volunteer Jam, a charity concert to benefit military veterans, when a fan held up his middle finger at Bryan several times during a part of the performance and verbally taunted him.

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Bryan seemed to challenge the man, who seemingly raised a hand against Bryan at the time. However, Bryan had the high ground and was easily able to deflect the blow.

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That’s when Bryan used his microphone hand to land a blow to the man’s head that knocked him off balance briefly.

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Bryan walked away from that area of the stage and continued his performance, with what seems like a good amount of extra adrenaline.

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Bryan’s team released a statement following the concert that stated:

“A man in the front row was making crude hand gestures toward Luke during his performance,” the statement reads. “It was insulting not only to him, but more importantly to the men, women and families sitting around him who were there to support and celebrate Charlie Daniels and the efforts of raising money for the military veterans — some of who were in the audience. The concert security personnel saw the man’s disruptive actions of the event and he was escorted out.”

Bryan got his start writing songs for his friends turned country stars Travis Tritt and Billy Currington before dominating the college and regional country music circuits in Georgia and the greater Southeast. Bryan is a graduate of Georgia Southern University, which is known for their dominate mid major football program which notably defeated the University of Florida in “The Swamp” without throwing a pass during a 2013 meeting.

According to a Rolling Stone report:

Charlie Daniels’ Volunteer Jam, a concert and charity event first staged in 1974, also featured performances by Chris Stapleton, Kid Rock, Travis Tritt and Three Doors Down. Daniels, celebrating his 80th birthday, closed out the event with his own set and a group jam. A portion of the proceeds will go to Daniels’ Journey Home Project, benefiting U.S. veterans.

Here is the video of the incident: