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A California man got a serious beat down on the Metro Blue Line train in Long Beach after allegedly using a racial slur toward the wrong woman.

The woman River-danced all over his head, and at one point she even stood on the seat to gain leverage and insure her stomps were making a full impact.

“Don’t kill him now,” says a bystander.

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The man eventually falls to the floor and after a few more stomps for good measure, the woman walks away.

No one reported the beating to police, who learned of the incident after footage appeared online, according to the Los Angeles Times per NY Daily News.

Investigators have identified the person who filmed the video and are looking for him to help them locate the woman and the man she beat.

“Blue Line on the wrong day, for real,” the bystander says.

We’d have to agree, for real.