GasparZizou
Super Freak
It didn't even occur to me that they changed the meaning of the title. The feral kid didn't grow up to become this new version of Max. No, the old Max degenerated to become the kid due to his time alone in the wilderness. He can barely speak at the beginning because he has become a creature of the wild and Furiosa's quest brings his humanity back out of the animal. He is no longer "mad" because someone killed his family. He had *gone mad* because someone killed his family. Brilliant.
I think I like the feral kid theory better, I got continuity OCD so I need that to make sense