From UK serials...
19/06/1978 WJ753 L Canberra B2 100 Sqn During an overshoot at Marham, Norfolk the pilot allowed the engine rpm to drop below the recommended rpm levels. The engines spooled up unevenly during the subsequent throttle up causing a severe asymmetric condition resulting in near vertical bank with the port wingtip striking the ground to the left of the runway. During the ensuing cartwheel, the cockpit section was removed from the fuselage, breaking between the pilot and navigator's seats. The pilot suffered serious leg injuries but the two rear crew were miraculously relatively unscathed
Does not mention rumble seat occupant,perhaps somebody on here could confirm.
Not long before this accident I used to work at the Canberra OCU line which was pretty close to this accident scene !