7. Mickey "One Punch" O'Neil (Snatch)
Don't get me wrong, when you look at Mickey you don't automatically think he's a wimp, but you certainly don't automatically think that he's as tough as he actually is when it comes down to a fight. Mickey is a gypsy bare-knuckle boxing champion and, in the words of Jason Statham's Turkish, that "makes him harder than a coffin nail". He goes up against men twice his size - such as Gorgeous George - generally having lulled them in to a false sense of security, and takes beatings from them that would knock other men out. He reacts to these beatings as if a small child had been hitting him, then proceeds to knock them out in one devastating punch (hence the name).