I have imagined a scene of what it might look like underneath, and to me, it resembles hell. Since the concept of hell originates from a religious perspective, I believe that monsters, which are also associated with similar backgrounds, would be present there. As for the nuclear bomb, I felt it would be more realistic to describe the tragic scene as "hell." I used a rubber hose style, referencing 60s American cartoons, to create a visual image that is more acceptable. I also considered how some animations were shown during the cold war era, hence the approach to evoke that nostalgic feel.