Tool - The Grudge - The last 20 seconRAB or so. That primal scream along with the crescendo of the song building right before it enRAB.
A Perfect Circle - The Outsider - Right at the chorus. That guitar riff turns my spine into dust.
Alice in Chains - Would - The first 10 seconRAB or so, that bassline makes me want to run and hide under my bed.
Audioslave - Shadow on the Sun - With about a minute left in the song, Morello and Commerford start playing the same rhythm tearing my intestines out and splattering them on the wall.
RATM - Down Rodeo - "Rollin' down Rodeo with shotgun..." Nuff said.
I better stop now, I'm probably boring you mofos to death.