Perhaps he's suffering from delusions of grandeur.
5 seconds sound clip from the Hercules In New York movie soundboard.
You can hear this line at 00:50:33 in the Blu-ray version of the movie.
Quote context
[...]
- If you will not take my advice, then heed my caution: beware of Nemesis.
- But, but he... (stammering) Ooohh!
- Perhaps he's suffering from delusions of grandeur.
- Uh-huh. But they're in institutions.
- The young man's aberration may be a mild megalomania.
- Well, I don't care. I like him. Even if he is a bit crazy.
- So do I, even if he did crack two of my ribs.
- A Greek peasant with delusions of mythological divinity. Fascinating.
[...]