Bat on a plane: Stowaway spooks passengers on Spirit Airlines flight in the US

Few things come without an extra fee on Spirit Airlines, but some passengers got a free shot of adrenaline earlier this week when a winged creature flew up and down the cabin.

Videos posted to social media showed passengers on a flight to Newark, New Jersey, screaming, laughing, offering suggestions and yelling "It's the Batmobile!" as what appeared to be a befuddled bat flew up and down the cabin Wednesday morning.

USA Today reported that the flight left Charlotte, North Carolina, at 6 a.m. Wednesday headed for Newark. Passenger Peter Scattini wrote on Twitter that the bat emerged "WHILE WE WERE 30 MINUTES INTO OUR FLIGHT" (the capital letters were his). He added that he had no idea where it came from.

One video includes audio of people riffing as the critter flies to the front, back and then front of the plane. At one end, a woman watches from the partially open door of a bathroom. Remarkably, one passenger appears to sleep through it all.

"It's the Batplane," a man says.

"It's the Batmobile!" a woman replies, before adding "Hey Batman!"

On another video, a woman can be heard saying that she had spotted the bat five minutes earlier. "I thought I was, like, hallucinating," she said.

One man didn't have to wonder if what he saw was real: he said he literally got hit in the head. In a response, Spirit asked for his reservation information so it could investigate, assuring him: "We want to raise your Spirit-s!"