As a Crowd Artist (literally my job title) I remember the fucking exhale when I saw this shot. The whole sequence after the earthquake is masterful and probably the example I would show to anyone who needed 20 seconds of animation to understand why Miyazaki is a genius.
Studio Ghibli’s The Wind Rises (2013) features a four-second crowd scene that took animator Eiji Yamamori 1 year and 3 months to complete