MUST SEE VIDEO: Extreme Subway Ride: Passenger Rides Outside J Train Car

NEW YORK (CBSNewYork) -- Talk about rush hour.

One man's thrill-seeking antics on a subway train are sparking a crackdown on what's known as "subway surfing." And as CBS 2's Kathryn Brown reports, it was all caught on video.

They were some of the luckiest moments of a man's life -- the day he decided to try what's known as "subway surfing" ... and live to tell about it.

Stunned straphangers riding the J train captured the stunt on their cell phones and later posted it to YouTube.

Some were concerned it was an emergency until they saw the man interacting with them. He's seen grinning and putting his fingers to his lips.

The man's high-speed antics are part of a recent underground trend where thrill-seekers latch onto the outside of moving trains -- risking their own lives as well as others.

"I think it's stupid and crazy," subway rider Brandon Santori told Brown.

"Oh no, hell no. Not even for a million dollars," added Hector Lopez of Tremont Concourse in the Bronx.

"Definitely extreme craziness and I believe it also creates a problem for other people as well and I mean I can't even imagine that someone could be so stupid," another straphanger added.

The Metropolitan Transportation Authority agrees, calling the man's actions both stupid and dangerous in a statement: "We have referred it to the transit bureau of the NYPD for investigation."

However, this incident was far from being an isolated incident. The fad is growing in popularity.

The MTA has launched a campaign warning riders not to try this -- something, you might think, would be common sense.

"How stupid can you get?" wondered rider Marcie Buffington.

"It's just crazy. It puts everybody in fear and panic," added Myra Diaz.

Police confirmed Tuesday night people have been killed attempting these kinds of dangerous stunts, but neither the MTA nor NYPD keep track of those statistics.

What's the strangest thing you've seen while riding the rails? Let us know below