I guess we can add "dancing while black" to the list of things you're not allowed to do according to the NYPD.

WATCH: Cops Throw YouTube Prankster To Ground For Dancing Behind Them:

New York City police officers threw a prankster to the ground for dancing behind them in a video that was posted to YouTube on Saturday.

The incident came about while prankster Alexander Bok was carrying out a dare issued by daytime talk show host and comedian Ellen DeGeneres, who challenged viewers to "sneak up behind perfect strangers" and "dance behind them without them knowing it."

Bok danced behind unsuspecting New Yorkers in and around Grand Central Terminal in the video, which was reportedly filmed on Dec. 24.

Bok started performing the "Gangnam Style" dance behind an NYPD officer but stopped when the cop noticed him and turned around. At that point several cops could be heard questioning Bok while he tried to explain that he was just dancing.

"What's wrong with you, bro?" one of the cops could be heard saying in the video.

"What are you dancing in the street for?" another asked.

"Are you a fucking asshole?" another cop could be heard saying.

The verbal questioning eventually got physical and ended when one of the police officers pushed Bok to the pavement.