Transcript for Severe Turbulence Injures People on JetBlue Flight to Orlando
It's a been a bumpy ride lately for countless airline passing passengers, with violently turbulent flights sending people straight to the er and with those racked with a fear of flying, an upgrade to high anxiety. Reporter: A heart stopping moment for even the most seasoned of flyers. The stomach wrenching scream inducing sudden jolt of extreme turbulence. You probably experienced a mild version of it if you're one of the millions that takes to the skies every day. Last year turbulence injured 21 people in the U.S. According to the FAA but in just the past week on U.S. Flights, 15 people say they've been injured by turbulence. Yesterday this was the scene inside the cabin. After severe turbulence shook a jet blue flight pack would people traveling from Puerto Rico to Orlando. The plane dropping 100 feet in altitude, just 30 minutes after take off. I was super scared. Reporter: Veronica torres on the plane with her daughter. She took this photo as oxygen masks deployed, many passenger's worst nightmare, the doors to the refrigerator bursting open. At least eight people hurt. Firefighters, paramedics and police rushing on board when the plane landed and in just the past week, two other turbulence incidents injuring pass chgers. The lady in front of us shot straight in the air and broke the over head compartment, bleeding everywhere. Reporter: And on this flight to jacquardau, people screaming and praying for their lives. A woman who took this video says the turbulence came with no warning. Everything was shook. The plane went up and down. A lot of people on the plane they didn't wear seatbelts you know. So, they're like flying. Reporter: Pictures of the aftermath showing aisles littered with debris. Nine taken to the hospital. Every year we end up with flights that encounter some form of severe turbulence and it throws people around and hurts people in the cabin. This is why it's so important to keep that seatbelt fastened. Reporter: But what causes the sometimes terrifying turbulence? So-called clear air turbulence because pilots can't see it. It happens when a fast and slow jet stream pass along side each other. If a jet flies through it, it can get very bumpy very quickly. What we're dealing with is unexect unexpexed, unpredictable turbulence. We don't have a way of a seeing it. Reporter: But turbulence is also the result of severe WEATH weather, including thunderstorms which can sometimes be detected by radar. We went aboard this test flight near ma'am. So, this purple color means? These test pilots actually aim for thunderstorm turbulence. They're testing this radar software being installed on American airlines jets to help its pilots navigate a smoother ride. You're predicting what's ahead? That's exactly right. Reporter: We skirt around the heaviest turbulence but still feel it. We're getting a little bit of that turbial N ulence right there. It's right outside the window. Reporter: Green on the radar means go. A path through the storm. When we've actually flown through the areas, there hasn't even been an ripple. Reporter: Also turbulence can be scary, it rarely damages the aircraft itself. They're so tough and well designed that they can take far more than the passengers and crew can. You're only dropping a few feet at any particular point. All he has to do is move two feet in any direction at 500 miles per hour and you're going to feel it in your stomach. Reporter: In fact your chances of dying in a plane crash are 1 in 50 million. But 1 out of 4 people still fear flying. And the rough air is a remiennder they're in the ground and fear of flying caught on camera. And that's why these men and women are here. Retired air force pilot turned therapist, Ron Nielsen is the plane whisperer. His class at Phoenix, Arizona sky harbor has one week to overcome a life of anxiety and for what for many is a painful fear. Reporter: Just go on and pretend like you own the thing. Captain Ron tries to teach his students to face their anxiety head on. It's a walk aboard a plane they've been assured is not going to take off. The first thing they need to do is give them svls permission to be afraid. Reporter: In seven days they'll go from a classroom to a real flight, Phoenix to Burbank, California and back home. It's the final stage of class, call it graduation day. I'm here taking care of my panic attack. Reporter: For Jessica cobble, it will take all the effort. She's never flown before. Grab a drinking straw, and breathe through the drinking straw. Reporter: Jessica forgot her straw. Oh, my god. Oh, my god, oh, my god. Reporter: She took a pill to take the edge off. Close the window. Reporter: What happens when you take that much medication? I didn't take a lot. Reporter: But he advises no drugs unless prescribed by physician. He says it may only add to your anxiety and Jessica has plenty of that. You focus on anything but it. The thing you should be focusing on is you. But I don't want to die. Reporter: Minutes later, much to our surprise Jessica is calm, actually enjoying herself. Wasn't as bad. It's actually beautiful. Reporter: The landing was as smooth as the flight. Jessica's scream for everyone in the class. Congratulations. Once again, you've cheated death. By flying with me. Reporter: But the real reward is having travelled from fearful to fearless, even if it was a bumpy ride. It's just an adventure. That's all it is. Reporter: From "Nightline," I'm David curly in Washington.
This transcript has been automatically generated and may not be 100% accurate.