THIS is the terrifying moment a teenager beats up an usher at a concert after he was asked to sit in his correct seat.

Footage shows the 14-year-old boy battering the 66-year-old at an NBA Youngboy concert in Kansas before shocked onlookers drag him away.

The teen, who has not been named because of his age, was arrested on Sunday, shortly after the alleged attack.

He was later charged with two counts of assault - one felony and one misdemeanor.

Horrifying footage shows the moment Schlange tells the teen his ticket doesn't match his seat assignment.

Minutes later, he is thrown to the ground as the boy launches his brutal onslaught .

The lad then appears to repeatedly punch the man before being dragged away by a fellow concert-goer.

Robert Daniel, who recorded the video, said th

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