This incredible musical face-off on the New York City subway may have taken place several years ago, but it has since gone down in internet history as a jazz performance for the ages.

Back in 2013, several subway passengers captured video footage of two musicians having what is supposedly an impromptu saxophone battle on one of the train cars.

At the start of the video, one of the saxophonists can be seen playing some tunes for a few attentive passengers—but he is eventually joined by a second saxophonist from the other end of the car.

The two men then face off in the middle of the train and begin covering everything from Michael Jackson's "Billy Jean" to "Chameleon" by Herbie Hancock—and as the tunes get jazzier and jazzier, the passengers quickly become more and more enthused.

Since two different videos of the event were uploaded to Youtube six years ago, they have collectively garnered over 14 million views.

It's quite possible that the performance had staged, rather than improvised—but that doesn't mean that their duets are any less impressive.

(WATCH the jaw-dropping performance below)

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