Board Thread:Naruto Discussions/@comment-4912646-20141016191738/@comment-4728499-20141017121155

Hard to say, iirc, most of sora losing control was due to anger, Kinkaku basically transformed to the highest level he could when he got mad, I'd imagine it's similar to Danzo almost turning into a tree, Kurama's chakra responds to negative emotions even if there isn't a conscious part of Kurama in the psuedo-jinchuriki since he is still connected to any piece of his chakra that is taken by someone.