terrifying moment for a group of middle schoolers in southern California. Nearly a dozen of them got hurt, some of them seriously, after the driver of their school bus lost control. Moments later, a... See More
terrifying moment for a group of middle schoolers in southern California. Nearly a dozen of them got hurt, some of them seriously, after the driver of their school bus lost control. Moments later, a frantic effort to save that driver. And here's ABC's bazi kanani. Reporter: The school bus, precariously perched on a steep Anaheim hillside, after a violent crash nearly split it in two, and sent terrified students clamoring to escape. The bus driver was out. A couple of children were hanging out. Gas was pouring out the back. Reporter: Stunned bystanders say the bus appeared to be driving quickly around a curve in the road, when it jumped a curb, and went airborne, snapping this tree like a twig. It went up. And either scraped the tree or went up the hill and fell off of the tree. Reporter: Students scrambling to get out the rear door exit. Five students were rushed to the hospital. The 24-year-old bus driver, trapped inside. His feet dangling out the window. Crews able to free him and take him to the hospital. His father said his son knew this route well and had no medical conditions. Investigators are now questioning him. Want to find out what the speed was. If he was alert or attempted to brake. Reporter: Fortunately, all of the students are expected to be okay. For "Good morning America," bazi kanani, ABC news, Denver.
This transcript has been automatically generated and may not be 100% accurate.