At about 1515 eastern time, a Beech 35 was damaged while landing at the Laconia Municipal Airport. The pilot was not injured. The pilot reported the right brake was not functioning as the airplane touched down on runway 26, a 5,286-foot long asphalt runway. The pilot attempted to move his leg over to the right seat rudder pedals in an effort to use the brakes on that side. During the process, he inadvertently pushed the throttle to the full forward position with his knee. The airplane then departed the left side of the runway, proceeded over a grass area, over an embankment, and came to rest in a swamp.