Primus played up to par Thursday at the Newport, but it was the crowd that ruined the show.Bassist and lead singer Les Claypool put on a great show, despite an unruly and violent crowd. Midway through the show, he actually had to stop and ask the audience to refrain from throwing objects on stage. When they persisted, he had to threaten to end the performance to get them to behave.The mosh pit is not a gang land rumble out of S.E. Hinton’s “The Outsiders.” There are unwritten rules of etiquette that are integral to everyones enjoyment of the show. Basically, don’t do anything to someone you wouldn’t want done to yourself. Small courtesies can make the show better for everyone, including the band. For those concert goers that remained off the floor and out of the pit, however, the show was impressive.During the bridge of nearly every song, the band went totally off base, playing riffs from groups such as Black Sabbath and Pink Floyd, giving their songs a feel that can only be experienced live. Drummer Brian “Brain” Mantia and guitarist Larry LaLonde had their work cut out for them, trying to keep up with Claypool. Seeing Primus live is the best way to experience the band, as they change and improvise every song. Although this show was short, musically it was tremendous. It was most likely the fault of the crowd, with their lack of respect for Primus and other members of the audience, that caused the band to play for barely an hour. Highlights include “Sgt. Baker,” “Jerry was a Race Car Driver,” and “Tommy the Cat,” all three off their 1991 release “Sailing the Seas of Cheese.” “My Name is Mud,” another crowd favorite, comes off their 1993 release “Pork Soda.”With the Newport charging stadium size prices for club size shows, the increasingly violent and disrespectful crowds, and the brevity of the shows themselves, the ticket was just not worth the money.