Subway rider confronts predator

Nicola Briggs was never going to stay quiet when a fellow New York subway rider exposed himself and rubbed against her in a packed train.

"That's it!" she is seen yelling in footage posted online.

"You're getting f---ing arrested. I'm not leaving your side tonight ... I'm escorting you to the police station."

Ms Briggs, a tai chi instructor, was going to meet a friend for dinner when she was assaulted by the man one Autumn evening in 2010.

Footage taken by fellow riders was posted on YouTube shortly afterwards — and has since been watched almost two million times — but only now has Ms Briggs spoken out about it.

"There really are no proper words to describe the anger and sense of violation that one feels when something like that happens to you," she writes in the New York Daily News.

She is urging other victims to confront and shame sexual predators.

"There is already too much shame tied to being the target of this type of crime," she writes.

"I believe it's time that we, as crime victims, bring the shame back on the shoulders of the perpetrators, and be unafraid to tell the world our stories."

Ms Briggs said the man who assaulted her was arrested by transit police and later convicted of sexual assault.