Have any of you ever heard of Inward Screaming? It isn't usually used to sing a whole song, but usually used to add effect.. Anyways, the higher pitched screams sound like a screech, and the lower pitched sounds sound almost like gutterals..

Any of you ever tried this, or can you?

I think I can do it pretty well..and very loud, actually..I might send in a clip if you guys want..

Inhaled??

They're called inhale grunts, and yeah most of the people here have probably heard of them. Personally I don't like em, but you can get a huge range with it (pigsqueal-almost guttural) and it's not too difficult to learn. Send in a clip if you want, maybe you do it differently than others. By the way people are now bugging me constantly about my perfect cow and pig imitations I can do with inhales

Definately post some samples all o ya! I'd like to examine 'em ;-)