Charlie and Kirby are determined to tackle their weirdest fear: roller coasters! Charlie is on a mission to get over his motion sickness and Kirby is finally ready to conquer her coaster-phobia. To do that, they'll break down the physics behind these rides and learn all about how they work from an engineer.

Originally released by National Geographic, 2017. Streaming video file encoded with permission for digital streaming by Infobase on January 05, 2023.