Shakes on a plane.

Students from Colorado College did a popular dance called the Harlem Shake on a Frontier Flight over President's Day weekend.

It was posted on YouTube, where it's been viewed more than 450,000 times.

But not everyone is convinced it was all fun and games.

Tory Dunnan has more.

You've heard of snakes on a plane.

But how about 'shakes on a plane.'

The Harlem Shake is the latest viral-video dance craze. giving Gangnam Style a run for its money.

They usually start with one person dancing alone and then others jump in.

Now the Federal Aviation Administration is looking into a video.

It depicts a dance on a Frontier Airlines flight in mid-air from Denver to San Diego organized by a group of students from Colorado College's Ultimate Frisbee Team.

"It went from kind of this joking idea amongst the team to suddenly it's a reality, then it's on YouTube and then there were hundreds of thousands of views and now we're talking to you guys," says Matt Zelin, a Colorado College student.

The FAA wants to know if the plane was on final approach and if passengers should have been buckled up.

A Frontier Airlines spokeswoman says "all safety measures were followed and thee seat belt sign was off."

"Worst case scenario is we hit a little clear air turbulence and bodies start flying all over the place," says former airline pilot Jim Tillman.

Tillman says an airplace is not a place for fun and games.

"Is it fun? Maybe. Is it cute? Maybe. Is it good judgment. NO!" he says.

A YouTube search turns up plenty of other Harlem Shakers on planes.

A group of cheerleaders from Toronto was headed to a competition and says it did its shake during a layover.

"The plane was moving a lot, it's not a big plane so that many people jumping around like crazy was definitely moving the plane," says C.J. Pugh, PCT Cobras coach.

CNN reporet Tony Dunnan says in the Colorado case, Tillmon says he hopes the FAA gives Frontier Airlines a strong warning. He thinks the crew should never have let the dance go on.