Beyonce Knowles attends the Costume Institute Gala for the 'PUNK: Chaos to Couture' exhibition at the Metropolitan Museum of Art on May 6, 2013 in New York City. (Photo by Dimitrios Kambouris/Getty Images)

A fan in Copenhagen, Denmark, did what no one thought was a good idea when he reached out and slapped Beyonce on her backside during her concert on Monday.

It’s all captured in a video on YouTube appropriately titled “The stupid guy that slapped Beyonce.” As the singer strutted down the stage singing her song, “Irreplaceable,” a man standing in the front row joined in for part of the chorus. “To the left, to the left, everything you own in the box to the left …”

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