More: Jana Duggar is reportedly leaving 19 Kids and Counting for a better future
In the video clip obtained by People magazine, the camera captured the chilling scene when Josie, 5, had a seizure.
Parents Jim Bob and Michelle Duggar were not at home at the time because they were in Chicago at a meeting, and Jana and her grandma were in charge of the kids at home. Speaking of the incident, Jana revealed how Josie's seizure came without any warning.
"Josie had been completely normal up until this point," Jana explained. "She had been running around, playing."
More: The Duggars' carelessness with guns puts 5-year-old Josie in danger (PHOTO)
But when her brother James asked Josie a question and she didn't respond and was just sitting there, he quickly alerted his older sister.
"She was just sitting there, staring, and then started jerking," Jana revealed. "And then [James] knew immediately: OK, that's a sign of seizure, and so he ran and got me."
The clip then shows footage of a tearful Jana holding her sister's tiny body as she checks to see if she was breathing. Luckily, the director of the episode, Scott Enlow, was also there to give a helping hand. Jim Bob revealed during the clip that "Scott was just a few blocks away filming with some our kids when Josie had her seizure. And so they quickly hurried over to our house and tried to help keep Josie alive."
More: Jessa Duggar's husband is pretty confident they may be having twins (VIDEO)
The paramedics showed up just in time because Jana revealed that Josie was "starting to turn a little blue and purple."
This is, however, not the first time that Josie has suffered from a seizure, and according to Jana, this was her third or fourth time. Michelle also revealed that Josie has the tendency to have a febrile seizure if she is running a fever, and it can happen when you least expect it.