User blog comment:Akali95/Kuma's Nikyu Nikyu no mi/@comment-3181121-20120219122657/@comment-3119203-20120220034837

OP logic isn't applicable because people can't turn into light or lava in real life.

Kuma's power is strange though. Correct me if I'm wrong, but pain is a signal telling your brain that something is screwed up. Kuma might be able to simply halt these nerves, and pass the signal on to something else. When he does, Zoro's nerves go crazy, and the body spazzes out, hence the blood. I don't think this makes much sense, but honestly his whole fruit is crazy.