He was cured of cancer, yes, but never imagined what would become after the cruel experiment that saved him. The Canadian paramilitary Weapon X applied to Wade in a laboratory for unknown purposes, mad forever but also injected him from power.

http://www.thepressnews.co.uk/press-news/deadpool-online-eng-subs/

Image of 'The New Mutants # 98', the first magazine that appeared Deadpool.
Image of 'The New Mutants # 98', the first magazine that appeared Deadpool. enlarge
Simply, it became Deadpool, the same people hugging and then dispatches a kick. He who does not know whether it is good or bad. Which he stuns everyone with his nonsense and can kill without remorse easy with dangerous katana.