Does this anime quirk have a name? I've always liked this quirky anime technique, which was used in several anime around the 1990s and 2000s, but not THAT often. What is it called and how does it work?
How do you animate it and when does it get used?

I also found other examples
It's most likely a mix of,


Human Hummingbird
Kewpie Doll Surprise
Wheel o' Feet
Floating Limbs
Possibly also Thundering Herd if you want to consider the background or context for the first image