He’s nuts... just like most of Hollywood.
I imagine saying your lines over and over multiple times makes one screwed up. I call it living in the fantasy world of the Unicorn Farm. The armies of people making these film fantasies must have an effect on the actors as they get more automated with digital effects. They become cogs in the machine as expendable as a worn out part. Many are worn out just as they make it big and the house of their dreams becomes their loss. This is what happens when life becomes godless without value.