The comparison to "being in a movie" suggests that the narrator's experience of World War II was fragmented, with gaps in memory and understanding. This is indicated by the feeling of being disconnected from the reality of the situation, as if the events were not fully integrated into his experience, similar to how a broken film might jump from one scene to another without coherence. The narrator's sense of confusion and detachment is reinforced by the description of the sudden shifts in his environment and actions. Therefore, the correct response is:
It was fragmented, with gaps in memory and understanding.