Is this not something everybody feels?

I keep being surprised at both which feelings are universal, as well as which aren't. I think I know the one your'e talking about but from being kicked in the balls... For jumping I might have experienced it playing video games and falling further than I expected.

I experience the falling feeling in my legs and feet as well.

I definitely do not know the feeling you’re describing.

My favorite quirk of mine is aphantasia but kids are more entertained by ear wiggling.