Or the small Battle Wagon around the height of a child quintupling in size the next frame. Kiddos having fun is the main mission though :)

that kind of stuff happened routinely in the 70s-90s in mecha anime franchises that were designed/drawn/animated/produced by large teams of adults..

Mobile Suit Gundam and Evangelion are both notorious for this. Is Eva-01 40m or 100m tall? If you trust the technical literature then you'd be forced to deduce that the tanks in some of the scenes are squirrel-sized -- and these decisions and scenes are produced by committees.