A verbal dispute on the New York City subway unraveled into an underground brawl after a male passenger took a swing at a woman who insulted him.
Footage of the incident, titled "Man smacks the soul out of girl on the NY Subway," was posted to YouTube on Nov. 8 and has accumulated nearly 700,00 views.
WARNING: The video above may be unsuitable for some audiences.
In the clip, the woman can be heard insulting the man's style, making fun of his fur hat and telling him that his jacket "came out in 1990."
The woman then yells "You sound stupid!" and then swings her bag at the man. Finally, the man unloads a thundering, right-handed slap to the face, sparking an all-out melee as innocent bystanders flee the subway car.
The NYPD is investigating the incident, according to the NY Daily News.
A witness jumps in front of the camera for a quick video-bomb as chaos ensues behind him.