One second I’m good then I flip a switch
Then I’m thinkin’ I might die

from Crooked I (Ft. Slaughterhouse) – Monsters In My Head Lyrics on Rap Genius

Meaning

When the lights are on, he’s good, but as soon as he turns it off he’s terrified. .

this could also mean his mood swings from happy to depressed in an instant.

To help improve the meaning of these lyrics, visit “Monsters In My Head” by Crooked I (Ft. Slaughterhouse) Lyrics and leave a comment on the lyrics box