The snake biting its own tail expresses the perfect form, the circle, in other words, infinity and eternity. In contrast, the slide folding in on itself, seen here, is merely a deficient circle, a “U” shape, a quadratic function without parameters, the imperfection of which culminates in its dysfunctionality. Furthermore, a stable surface is necessary for sliding down, but there is only a flexible polyfoam material here. Sliding will much rather be falling in this case, but no need to worry, owing to the foam, the impact will only be serious enough to hurt.