True, and as far as I'm aware, it was the only aircraft where, in an emergency, the pilot was not the last to abandon the aircraft in flight.
As he had to exit via the roof hatch, and get onto the wing to escape via the trailing edge, it was the job of the rear gunner to hold the aircraft steady until this was accomplished, and there was a basic set of flight controls - rudder pedals and detachable control "stick" - in the forward section of the rear compartment.
Once the pilot had ( hopefully ) safely departed, then the rear gunner could bail out, either "over the side", or, if possible, via the belly hatch.