Disclaimer: I do not own and never will own bleach or The chuck norris roundhouse kick ™, however I do own a large bag of atomic warheads candy… no you can not has any!
Morals Chapter one
Bankai
For years after the winter war ichigo had a question in his head that would not go away. He knew for a fact that to be a captain you have to have a bankai. He also knew that despite faceing insanely strong enemys Zaraki Kenpachi never use his, So overcome with curiousity he traveled to soul society. He first went to renji because he knew that renji had served under zaraki at one point renji however had no clue and just to ichigo that everyone assumed he did not have a bankai. Ichigo was not detered however and chose to go to the best place for any information about kenpachi, provided you have candy to bribe Said sorce with. Yachiru confirmed that the 11th division captain did indeed have a bankai and the reason he never uses it is that there is no need coupled with the fact that its power has been known to cause dimensional rifts. Now she would not tell what the bankai was so he decided to ask kenpachi himself. This turned out better than you would think. Kenpachi was more than happy to show off because people seldom got up the nerve to ask him anything. So he told ichigo to stand back and said Roundhouse kick them to death CHUCK NORRIS. All of the sudden out of thin air chuck norris apears and roundhouse kicks ichigo in the face killing him.
The moral of this story? Some things you are best off not knowing, Zaracki's bankai is one of them.