A Scrotum Shell is generally seen as a very hard ball-sack. The most common reason for this is when a man (or woman) ejaculates upon the ball-sack, rubs it in, and leaves it to dry overnight. Upon inspection in the morning, the ball-sack should have a shiny, hard layer, although this depends on the constitution of the semen.
a stupid, pointless, piece of shit anime. i watched it out of curiosity and couldn't stand 5 minutes of the shit! it bored me out of my mind. basically just some sleep-inducing governmental crap, a lot of it set in a boardroom. yaaaaaawn.
never watch Ghost in the Shell Stand Alone Complex, EVER, lest you wish for you brain to deteriorate and drain out of your ears from boredom. it's just that bad.