NYU student slapped from behind, thrown to ground in random attack caught on video

"When I turned around, I saw this old, White guy and, like right when I turned around, he like grabbed my f---- hair like this and like yanked me and threw me to the ground," said Lewis.

A group of girls is then seen in the footage helping her up after she was knocked off her feet.

Lewis said the surveillance video was obtained by a friend of hers from a nearby liquor store. She described the assailant as a tall man with long brown hair and a long brown beard, wearing gray sweatpants, a black puffer jacket and a blue towel around his neck.

Lewis warned other women at the university to be careful and aware while walking around the city.