After departing from Burbank, traffic alerts required a Southwest Airlines flight crew on a Las Vegas-bound plane to "climb and descend to comply with the alerts," according to an airline representative.

One person on the flight said on social media that some passengers “flew out of their seats and bumped heads on the ceiling.”

A Southwest flight out of Burbank rapidly descended 475 feet to avoid another plane on Friday, according to flight tracking data and passengers on the plane.