Pittsburgh Steelers wide receiver Antonio Brown was flagged for twerking after scoring a touchdown during Monday night’s game against the Washington Redskins.

During the third quarter of the game Brown caught an over-the-shoulder pass for a touchdown. After scoring, he celebrated by twerking in the end zone. Brown was then penalized 15 yards for unsportsmanlike conduct and could be fined $9,115 by the NFL for the celebration, according to the Washington Post.

The penalty falls under Section 3, Article I of the rule book, which states that any player will be penalized if they do one of the following acts on the field: throat slash, machine-gun salute, sexually suggestive gestures, prolonged gyrations or stomping on a team logo.

Apparently Brown's twerking falls under the sexually suggestive category, but fans liked the celebration and reacted to it via Twitter.