SF Sketchfest co-founder David Owen surprises birthday girl Kristen Schaal with a cake as Michael J. Nelson, Kevin Murphy, Bill Corbett, Adam Savage, Paul F. Tompkins, Cole Stratton, Kevin McDonald and Janet Varney look on at SF Sketchfest Opening Night: RiffTrax Presents Night of the Shorts IV: Riffizens on Patrol at the Castro Theatre, January 24, 2013. Photo by Jakub Mosur.