IIRC from reading some WWII pilot memoirs that the recommended procedure was to pull up (to bleed off speed), unbuckle, and then push the stick forwards, and th

IIRC from reading some WWII pilot memoirs that the recommended procedure was to pull up (to bleed off speed), unbuckle, and then push the stick forwards, and the negative G would throw the pilot out of the cockpit. Might be a bit more difficult in reality with the plane on fire and missing control surfaces, though.