BOSTON (WHDH) -- Boston police said a man became agitated as he was ordering a beer during the Madonna concert Tuesday night and slapped a beer tap handle into the air, which then struck a woman in the head.

“Here are the five stitches and they glued my nose so I don’t get a mark after,” said Hetyene Costa, who was struck by the beer tap handle.

Costa sustained serious injuries including a gash to the head while waiting in line for a drink during the Madonna at the Garden Tuesday night.

“It was like blood everywhere and I almost passed out but I didn’t pass out. But there were a lot of people holding me so they put me on the wall and they gave me a cloth and water but I didn’t pass out,” Costa said.

According to prosecutors, Costa -- who had a third row, $600 seat that her husband gave her for her birthday -- was in line waiting for beer when the suspect, identified as Jeffrey Jansen of Medford, became upset that he had to wait so long.

According to the police report, he even threatened to “pound someone’s face in.” It was then that prosecutors say he slapped the handle to the draft beer, hitting Costa in the face.

Jansen appeared in court after he was charged with assault and battery with a dangerous weapon. Jansen claimed he had no idea why he was arrested.

“Honestly nothing happened. It was just like that. I walk away from getting a couple of beers and they put the cuffs on me,” Jansen said.

Costa has five stitches in her head, swelling around her eye, and a cut on her nose.

“I hope the police pick the videos and they’re going to see he did something,” Costa said.

Costa ended up missing the concert altogether and had to spend six hours at Mass. General Hospital.

Jansen is due back in court next month and has been ordered by the judge to stay away from the victim and the TD Garden.