Board Thread:Questions and Answers/@comment-25051789-20140627010334/@comment-25032153-20140627013851

you could think that they show that the amount of power of out of control power built up before he had to release it as Ichigo was first shown how to do it by Hat and Clogs then Kenpachi was because of his huge amount of resiatsu he had and it grow after his patch was taken off.