The
Jefferson Airplane concert at the Rubber Bowl in Akron, Ohio was accompanied by an unusually heavy police presence because of a bomb threat. Fans began throwing rocks at the police, who responded by using tear gas. The band sided with the fans, and bassist Jack Casady called the police “pigs”, prompting the officers to intervene directly on stage and arrest him. A fight broke out, during which guitarist Paul Kantner was knocked to the ground and singer Grace Slick was hit with tear gas. Jack Casady, Paul Kantner and Grace Slick were later arrested and had to return to Akron to resolve the charges. Each was fined $50 and given a suspended 30-day jail sentence. Another member of the group was also injured during the incident.