User blog comment:Akali95/Kuma's Nikyu Nikyu no mi/@comment-3181121-20120219122657/@comment-2201203-20120219185228

"The first and foremost strength of the fruit, as demonstrated by Kuma, is that the user is able to push virtually anything they touch and send it flying at an extremely high speed. This includes both tangible materials such as people and objects, and intangible materials such as air, the ghosts generated by the Horo Horo no Mi user and the sensation of physical pain"

"Kuma is also able to use his powers to push out the pain and fatigue from the body of another person. These sensations are then manifested into a red bubble resembling a paw. With this technique, the pain the original person suffered can be transferred to another through direct physical contact with the bubble. This transfer leaves the recipient in agonizing pain, and the benefactor feeling healthy and energized though their wounds are not healed "

both from the df page