RiffTrax Live: Night of the Shorts IV - SF Sketchfest 2016

Mike, Kevin, and Bill from RiffTrax were joined onstage at SF SKetchfest Live 2016 by very special guest riffers Bridget Nelson, Mary Jo Pehl, Cole Stratton, Janet Varney, Adam Savage, Paul F. Tompkins, and John Hodgman including a gigantic, possible world record Ten Person riffing grand finale!