I recently hear a story from my boss about a man she knew that was involved in the 1989 Loma Prieta Earthquake that hit the Bay Area. This is the quake that caused a section of the bay bridge to collapse, as well as a long section of the 880 freeway, known as the Cypress Structure Viaduct.
Today, I came across the following video and watched it. At minute 16, Buck Helm is mentioned in this public record video created by the CHP. It's pretty amazing to watch this video.