Originally posted by RE: Blaxican
Can't stab through the prison without breaking it.kekekekekekekekekeke
So? Kakashi's dead at that point, Zabuza's victory. It does no good to be freed after you get stabbed by the Executioner's sword.
Though come to think of it, I'm not even sure if that's true. When they've been broken, it's been by more than just having their surface pierced by a sword. Neji's escape involved blasting all of the water away.