What to you hear when you pound your head against a wall?

Bunk. Keep it up and you become a bunker.
Or paint a racing stripe on it. We don't care.
What to you hear when you pound your head against a wall?

Bunk. Keep it up and you become a bunker.
Or paint a racing stripe on it. We don't care.
Kinda bright, considering how dark it is.

Interesting though. (Tingly too, especially in the middle.)
Where I grew up, they called them flower petals.

Around here it's blue holes. I get it, sorta.