that panel was so not like kakashi, this doesn't sound like him at alll, it would be much better if he said "everyone, get back, im about to go on rampage!" oh some $hit like that...
or better yet, much more epic, if he had said nothing and actually did go on rampage wtfpwning "minato's style" taking out every edo and then some random ninja screams "omg kakashi went rogue, he is on rampage mode." o.o
next panel we see one of the edo kages looking far away and thinking "white fang?"
then another random ninja says "he is kakashi, the man who copied one thousand jutsus!"
then there is a big panel, where we see he is standing on top of a bunch of corpses and in his hand we see the head of mangetsu, then he looks back at his platoon and see everyone in disbelief, no1 is moving, then he says, "oh i'm sorry, did i break your concentration?" xd