Dick Van Dyke has treated diners at a Denny's restaurant in California to a rendition of the song "Chitty Chitty Bang Bang'' the title song from the 1968 movie of the same name. A post accompanying a YouTube video of the performance says the 90-year-old Van Dyke and the other three members of his quartet, The Vantastix, had just finished an appearance on a local television show before going out for breakfast. The video shows the quartet seated with pancakes at the table and singing the theme song to the British musical, which starred Van Dyke. Van Dyke and The Vantastix are promoting a show later this month in southern California.