What the thread title says. Doesn't have to be the most extreme **** ever, or the most extreme stuff posted in the thread, just the most brutal stuff you've ever heard personally. Post Youtube vids or other links if possible.
*I'm including crust punk, powerviolence, and metalcore just to remain inclusive. And because my entry is powerviolence.
The **** I just discovered that inspired this thread. If any of you can top this then I'll be giddy as a school girl. Thedowngoing are just insane.