"76 Trombones" is from The Music Man (1962). The song was written by Meredith Willson for the Broadway stage production which first premiered in 1957 and originally performed by Robert Preston.
Erik Estrada had no experience with motorcycles prior to being cast in 'CHiPs (1977)', and underwent an intensive eight-week course, learning how to ride. In August 1979, he was seriously injured in a motorcycle accident while filming a season three episode, fracturing several ribs and breaking both wrists. The accident and Estrada's subsequent hospitalization were incorporated into the series' storyline.