A cellphone video shows an enraged man threatening to use a razor blade to "slice up" a fellow passenger on a New York City 6-train.

The video, titled "Maniac threatening to cut people on train," has made its way to YouTube.

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"So after kindly refusing to talk to this man, he became beligerent toward me and my friend," YouTube user E Lopez wrote in the video description. "Thanks to a kind stranger, he was lead away but he began to threaten that guy with a razor (you can see it in his hand)."

The "maniac" in the video is clearly harrassing the women on the train and asks other passengers "Did anybody see me touch this b-tch?"

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A stranger intervenes and tells the man to move to the other side of the train who then threatens to "slice up" the man for touching him.

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