You bumped your head on the ceiling. And your scalp must be a bruise. Such a state it is.
I don’t know why you crane your neck–why you surge and bounce. You got a bad one there. Maybe it’ll calm you down.
Once I bumped my head. I bumped it twice, in fact. Actually, I’ve bumped and bumped. The ceiling bears an imprint.
That ceiling gets no softer. And neither should your head. We’ll just see how yours reacts. We’ll just wait and see.