This Is What Happens When A Rat Rides The New York City Subway (VIDEO)

A very unwelcome passenger boarded a Brooklyn-bound A train on Monday morning in New York City.

"A usually boring Monday morning commute to work at Brooklyn was stirred up by this little guy," writes Jinais Ponnampadikkal Kader on YouTube, where he posted a video of a large rat scurrying around a subway car, sending his fellow commuters into a frenzy.

"[The rat] joined us at the Fulton street station on the A train going downtown. Someone getting off the train was screaming 'RAT on the train!' But by the time everyone realized what was happening, the doors closed and the train entered the tunnel. We were stuck with him till the other end."

Most of the straphangers in the video can be seen jumping up onto their seats, while others just lift their legs. Almost everybody takes out phones and begins filming the mayhem.

While there's a lot of screaming, there's also a lot of laughter and smiles. And hey, at least the rat didn't crawl over anyone's face.