Last night's show at the Fillmore was on fire. Literally. Before headliners Dethklok hit the stage, an electrical fire was "sparked during Soilent Green's opening set," according to SF Weekly. Fans were ushered out of the building posthaste. Yikes. Sadly, Dethklok couldn't go on, and the show was canceled. Dethklok's MySpace page breaks the news to their fans: SF Show at the FILLMORE CANCELLED BECAUSE OF FIRE: Last night June 6th a small electrical......