u/Obstinateobfuscator

[Edit - VTO = Voluntary Tubal Opening, a way to equalise your eara without pinching your nose or blowing, etc, just by using the internal muscles to pull your estachion tubes open]

For me it's like the muscle next to the rumble muscle (next to the click/crackle muscle). I used to practice the rumble when I was a kid, and mines like overdeveloped or something. I could VTO inverted, upright, however wherever on day 1 of training without any coaching.

I'm super curious if this is common among ear rumblers.