Sa-da-ko has been described in the past as sometimes human and sometimes something else...

Take a tortured vocal add 1 ton of shredded down tuned guitars, sprinkle with scalpel sharp lead breaks, hit on a high temperature then throw in a low end resonating bass sound, Stir in a drummer that gallops with feet of molten iron and hits the drums with a set of hammers and you'll have the begins of band that can only be seen to be believed.

Hellyeah!!!!!