A human body... just press the muzzle into a fat fold and have at it.
He wanted the quietest suppressor. Not all shooters need to empty the brain pan... more than a few of us are quite capable of hitting vital organs in the bod.Really? I've found that a pillow works wonders. Plus, you really want to put a few in the head, just to make sure.
Not many people have fat folds on their heads!