Physics Brain Teaser - If you are in a steel, vacuum sealed capsule...?

If you are in a steel, sealed capsule (just for the sake of things - say the size of a large couch) and you and a fly are in there together. You get projected at the speed of a bullet - aprox 2000+ ft. per second and then smack into the face of a mountain and come to a complete stop, but the fly was flying around at the moment of impact does the fly smack into the front of the capsule with you. Or, since he was flying and therefore relatively the same weight as the air that surrounds him, would just maintain flying right there. I was just curious! - It's kinda like when you are going real fast in a car and a fly is flying near you and you slam on the brakes and everything grounded to the car flies forward but the fly just stays in the same spot - relative to the car of course.