At the Roxy Theater, a bomb dropped out of a slashed seat onto an upholsterer's workbench without exploding. A seat bomb exploded at the Paramount Theater; one patron was struck on the shoe by bomb fragments but disclaimed injury. Investigators discovered a small penknife pushed inside the seat, one of several found at theater seat bombings. They theorized that the bomber left his knives behind in case he was stopped and questioned. In December, a bomb exploded without injuries in a Grand Central men's-room stall.