Goodby, Silverstein & Partners excels at goofy little in-joke videos about the agency. Here's its latest one—a Ken Burns-y mini-documentary celebrating the agency's 150 years in business, created to mark the more truthful occasion of 30 years in business. It tracks the San Francisco agency's entire history, from its apparent founding by Jefferson "Applejack" Goodby and Richard Montgomery Silverstein in 1863 through its greatest marketing successes—notably, the "Have you any milk?" campaign—all the way up through today. Pretty funny stuff. Credits below. Also worth checking out: a piece that Goodby wrote for Adweek a decade ago about what he hadn't learned in 20 years of running an ad agency.