Warning: this video contains violence and bad lanuage

Four people were arrested after an incident involving a man hitting a woman on a New York subway train descended into an all-out brawl between male and female passengers.

Dramatic video footage of the clash, entitled ‘Man smacks the soul out of girl on the NY Subway’, quickly went viral after being uploaded to YouTube on Saturday. It had been viewed over 2.5 million times by Tuesday afternoon.

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