Interesting 3-min film clip ("home movie"?) of the Grateful Dead (you'll spot Jerry Garcia, Mickey Hart, Bill Kreutzmann, Bob Weir, Phil Lesh) and the Rolling Stones (you'll see Mick Jagger, Charlie Watts, Mick Taylor) on Dec 6, 1969, on the SF waterfront near The Ferry Building waiting for a helicopter ride to the infamous Altamont concert in Livermore. As you know, The Dead decided not to go after hearing of the unrest among the crowd at the site.
http://www.youtube.com/watch?v=TZizWlGjACY