Fun Fact: As a 90's derpweasel teen when Pat Smear joined up he was always "that OTHER guy who is obviously just there to look weird, spazz out and fill in some sonic guitar space". About a year ago I found out he was the guitar player for The Germs... who are considered to be the first "hardcore" band and their sound pretty much founded the whole scene.
He's also a pretty freaking good noise hound.