Tongue Rolling !

I myself can do this. I mean to that degree and do it for fun. I can also do a slight jaw flex that's hard to explain how and open and close my eustachian tubes repeatedly and effortlessly which helps when you have vertigo conditions and ear pressure starts a spin session from it. Great for sinuses too. I have a very unique, weird, rare body especially my brain🤣

I can do the tongue thing too ... Does that make me weird ?

No it's just a less common ability but in my case different functioning neurodivergent brain and able to do multiple things like this which multiple rares can add to weirdness.

Interesting

I was wondering what would be the evolutionary advange behind that ability, then I remembered it does come in very useful for spitting grape pips with great accuracy at my brother