Accident : While exploring the city, the Kettenkrad breaks down and Chito cannot fix it.
Technology : The girls encounter a woman named Ishii who offers to fix their vehicle in exchange for helping her. Together they finish constructing a simple airplane which Ishii is building from old plans in an effort to escape and reach a neighboring city.
Takeoff: Once completed, Ishii sets off in her airplane, only for it to fall apart shortly after take-off. Luckily, she manages to parachute out safely and she slowly drifts down to the lower levels of the city.