On larger doses of acid where I'm suffering immense mental agitation, the common visions are spirals, coils, and snakes.

In particular, a snake with no head, but rather attached to itself to form a hula hoop. Trying to turn over, but it can't. So it's there writhing infinitely.

The futility of it is a good representation of the abject overstimulation I'm feeling in my head. And, of course, a nice feeling of terror to go along with it.

Whenever snakey things are on the mind, I know that it was a bigger dose than I intended, and I'll soon be holding on to a panicking brain.