(On waking up) A static pulse runs through your body like a booming bass playing in the distance, but you aren't in any pain.

(After being jabbed with Floofty's in-progress Snaktivator) It doesn't hurt, but suddenly the subtle vibrations in your body become not-so-subtle.

(While turning into a monster from the above) Your body is still pulsating, an internal swirl of chaos taking over.

(While meditating) You feel a low-level hum throughout your entire body. The harmony of a thousand voices in a chorus just outside the range of hearing. All the things you shouldn't know but somehow do, whispered through you from far below. You shut all of it out, and for the first time since you woke up here, you feel stillness.

(In a dark tunnel) It strikes you that maybe your googly eyes could never see to begin with. That you've so far been experiencing scent and vibrations in ways that a human mind couldn't possibly comprehend.

(In the Undersnax) Every crevice of this place sings to you!

(In ????'s chamber) You are in a chamber of magnificent scale. A slow pulse travels through the floor. Up ahead you witness what has the world around you so afraid.

Also the endings where you get eaten don't mention vibrations, but All things considered, this is not a bad end for a Bunger. You're distantly aware that it is your purpose to be eaten! Now your Snakmatter will suffuse Grumpuskind, and slowly but surely bring about the next generation of Bugsnax.