when someone fucking blows out their throats into the microphone in a spine-tingling, heart pulling, mind numbing moment of pure beauty and awe.
In "Where did you sleep last night?" by Nirvana, Kurt does one of the best grunge screams ever, from 3:44 in the youtube vid to the end of the song. Even better; go look up "Kurt Cobain scream medley" on youtube. First vid there. THE BEST EVER.