Black Snake Moan
That one dark thought or memory, that's always there, no matter how hard you try to forget. Comes back when you're feeling low, and escalates your low to a whole new level of dark.
"That voice in my head,

every time I think it's gone,

it comes howling back.

Calls me when I'm ailing,

when I can't find my way home.

Lost in the pines

I calls it the Black Snake Moan." Lazarus Redd