Tell me if I am wrong but wasted or not.... that was the best fight in Naruto in a long time!
Kakashi passed out after gaining MS it i possible he didn't reakize he had it. I mean he didn't use it in battle until after he got defeated by Itachi, right.
He may think that he recently acquired it through training his eye.
Anyone think that this rainbow love stuff should be shelved and go with this type of action? I would love to see Naruto fight like that, but is it a coincidence he doesn't use blades to actually attack people?