On the downwind leg of a forced landing into a field, the pilot made a 180° turn, at minimum speed, to avoid a line of trees ahead. On completing the turn, the pilot raised the nose to avoid hitting the ground nose first. This caused the aircraft to stall into the ground. During the impact sequence, both wings and the undercarriage became detached from the fuselage. The pilot and passenger were able to leave the aircraft’s open cockpit by themselves; however, the pilot was later hospitalised.