 CONT: The flying wing has 2 obvious bubbles on it, 1 for the pilot  (without a machine gun in it) and 1 for the tail gunner (with the  machine gun). Marion originally gets trapped in the pilot bubble,  then shoots at the soldiers from the rear bubble, and then is  rescued from the pilots bubble again. If she were trapped in the  front bubble, she would not have been able to use the tail gunners  machine gun.