It's Not an Animal That Typically Flies With Airplane Passengers. But What It Does in the Cabin Proves a Tad Much.

When University of Massachusetts-Amherst professor Jonathan Skolnik first saw it, he figured it had to be a duffel bag, WSHM-TV in Springfield, Massachusetts, reported.

But it didn't take long for Skolnik to figure out that the package next to him on a US Airways flight out of Bradley International Airport in Connecticut Wednesday was piece of luggage.

Image source: WSMH-TV

"We could smell it and it was a pig on a leash," Skolnik told ABC News. "She tethered it to the arm rest next to me and started to deal with her stuff, but the pig was walking back and forth."

It's owner was allowed to board the plane with her pig — which the professor guessed was between 50 to 70 pounds — since it's considered an emotional support animal, ABC News added.

He added: "I was terrified, because I was thinking 'I'm gonna be on the plane with the pig,'"

The odd addition to the pre-Thanksgiving flight didn't last long, however.

Another passenger, Rob Phelps — who snapped photos of the pig and its owner — told WSHM that the pig was squealing and defecated in the aisle, which led flight attendants to ask the animal's owner to exit the cabin.

Phelps told the station the owner left before takeoff without incident.

CBS 3 Springfield - WSHM

(H/T: Inquisitr)