Just in time for the Corcoran's "Pump Me Up" show about D.C. in the '80s, filmmaker Joseph Pattisall posted a trailer yesterday for the upcoming documentary "The Legend of Cool 'Disco' Dan," about one of the city's most notorious street artists. And it looks awesome -- not only does Chuck Brown make an appearance, but Marion Barry talks about getting set up (he doesn't repeat his most famous quote verbatim, though). The film will screen at AFI Silver Saturday, Feb. 23, at 8 p.m. -- the day after the Corcoran's "Pump Me Up" party with Henry Rollins.

Even better, the trailer offers a clue to a Going Out Guide mystery: Last week, I wrote about a breakdancer named California, whom an artist's daughter was seeking -- she wanted to reunite him with a portrait her mother painted of him. California appears briefly in the video around the two-minute mark. I've contacted the filmmaker to put us in touch.