its a jutsu not a power up. it might have something to do with kyuubi's chakra but what doesnt when it comes to naruto? a simple kyuubi power up is just lame and boring and i think kishimoto got brains enough to know that.Originally posted by: RasenDori
then you may as well stop reading right now, because im pretty certain its a given that its a kyuubi power up. i dont think that jiraiya is reckless enough to teach naruto a dangerous move. if you look at the look on narutos face when jiraiya tells him not to use "that" jutsu, it looks like naruto remembers doing something awful with it. i bet he totally lost control of himself sometime during the training and completely freaked everyone out. dont worry, im sure naruto has a few new moves, but i think the thing that worries jiraiya is kyuubi related.
in response to BOO Z, its simple to "revive" kyuubi, break the seal on naruto. if they need 8 demons to do that they sure are overestimating narutos power. akatsukis goals are probably something along world dominance or total control of the ninja world. they are all missing nins that supposedly dont like their respective village, they probably want to take over or destroy them.