After a Sunday brunch at the Ferry Building, Grateful Dead drummer Bill Kreutzmann decided to do an "undercover" impromptu performance alongside a busker, with the aid of some overturned buckets and pots. Did anyone catch this free performance, in advance of the Dead's farewell shows this summer in Chicago and SF?

Says Kreutzmann, in posting the video to Facebook, "Remember parking lot drum circles? I do. (And I'll still join in, undercover... even after Sunday brunches in San Francisco.)"

The latest rumor about their final local shows, via Jambase, is that the Dead will be doing two shows on June 27 and 28 at Levi's Stadium prior to their July 4 week trio of shows in Chicago.

[h/t: HuffPo]