when does adrenaline ward off pain?

from what i've gathered, it applies to stab wounds and major trauma, such as a bite wound from a shark. i have not heard that it would ever apply to burns. i wonder what kind of situations it applies to. when do you not feel immediate pain when you're injured? i'm guessing everything that has to do with just the epidermis won't be applicable. that the injury has to be deeper than that to warrant the pain dulling effect adrenaline gives. thoughts?