which leave you wondering how a human made that noise:

Manatees - The Pulp Cut (from a sound only dogs can hear to a vocal chord ruining scream and then the greatest Hetfield impression ever in one song)

Electric Wizard - Supercoven (the throat bleeding bit at the end)

Down I Go - Nicolae Ceaucescu and Ariel Sharon especially but everything theyve done; i have no idea how he manages to gig without vomiting up his lungs.