During a flight from Colorado Springs to San Diego, a group of students started the Harlem Shake, a dance to a song of the same name.
In the suddenly popular YouTube videos, one person starts dancing, then the video cuts to a large group of people dancing, many in costume.
Matt Zelin, a sophomore, told the Colorado College newspaper, The Catalyst, he asked a flight attendant for permission beforehand.
FAA spokesman Allen Kenitzer said Thursday they're looking at what phase the flight was in during the dance in the aisles.
Frontier Airlines says the seatbelt sign was off and safety measures were followed.
