Wonder. It's October 5th, 2016 at Louisville International Airport in Kentucky. 44-year-old Brian Green buckles a seat belt and stoves his overnight bag under the seat in front of him.

He's on Southwest Airlines flight 994, headed to Baltimore on a business trip.

But for the plane ride, he's wearing a blue track jacket and Nike's.

He takes his new Samsung phone out of his pants pocket and texts his wife to say the plane's about to

take off and he'll call when he gets to his hotel.

Welcome on board Flight 994. We are currently third in line for takeoff. We ask that your seats and tray tables are in the upright position and please turn off all personal electronic devices or put them in airplane mode.

However, if any passengers have a new Samsung Note 7 phone, you are required to power down your device for the duration of our trip.

Thank you for choosing Southwest Airlines. Enjoy your flight.

Green shakes his head and frustration that he won't be able to use his phone at all while they're in the air.

Two weeks ago, Samsung issued a recall for his original phone a defective battery.

He exchanged it at the AT&T store

for this new replacement model.

It should be just fine, but he shuts it down anyway

and places it back in his pocket.

Green looks left and right trying to figure out what the popping sound is he just heard.

A woman across the aisle points at him in horror.

Oh my God, his pants are on fire!

Hideous thick green-gray smoke billows out of Green's pocket.

The reek of burnt rubber fills the cabin.

Green grabs his smoking phone and throws it into the aisle.

A nearby passenger waves his hands in front of his face trying to clear the smoke.

Don't throw it at me. get that thing off the plane.

...