ANTHRAX vocalist John Bush was involved in a scuffle with a member of the audience at last night's gig at Nation in Washington D.C., where the group were performing as part of their ongoing US tour with JUDAS PRIEST. According to eyewitness reports, a person in the crowd had repeatedly flipped Bush off, causing the vocalist to throw down the mike and approach the front of the stage in order to confront the offending individual. As the band stopped playing and bassist Frank Bello joined the singer in shouting back at the troublemaker, Bush reportedly took a blow at the guy which may or may not have missed its intended target. Eventually the source of the problem was removed by security and ANTHRAX resumed their set, but not before Bush voiced his extreme displeasure at the preceding events in the form of an obscenity-laden barrage that was viewed by some as having been “unprofessional”. The rest of the show reportedly went off without incident.