Why did movies do this? It never looked good and looks stupid still. I don't know if this still happens but when I think of films that have them, they are a bit older (e.g. Gladiator, Fellowship of the Ring).
Is it in-universe lore meant to represent that there is so much action going on, the FPS of reality itself is lowering??
Is it in-universe lore meant to represent that there is so much action going on, the FPS of reality itself is lowering??