This article and video originally appeared on “Seattle Refined.”

When one King County Metro driver’s heart attack sent a bus down an embankment, an off-duty colleague intervened to save the driver and the passengers.

King County Metro Bus Operator Chyee Howell was driving the family car with two of her children and her niece on July 12 when they first noticed a Metro bus that had gone off the road. The bus was partly on its side and had come to a stop midway down a ravine with the vehicle’s engine still running.

With no one else yet at the scene, Howell didn’t hesitate to act. Read more.