and i feel like maybe a lot of people just do that and then attribute it to whichever one of the following applies to them:
- anxiety
- adhd
- autism
I think everyone's a little right in this case, it's a stim and everyone stims to one degree or another, I'm sure there are a decent number of neurotypical people who shake their leg like that as well but it's probably a lot more noticeable in people who do it often because they have neurotypes that stim more often in general, such as autism and adhd and anxiety. So it's a part of those things but not exclusive to it
also a fan of infinity cubes like https://www.amazon.com/Infinity-Fidgeting-Spinner-Anxiety-Fingers/dp/B071X8S8WQ/