Frank Slade: I want it wall to wall with John Daniels.
Charlie Simms: Don't you mean Jack Daniels?
Frank Slade: He may be Jack to you son, but when you've known him as long as I have... That's a joke.
Frank Slade: If I were the man I was five years ago, I'd take a FLAMETHROWER to this place!
Answer: He's not mentally ill. He was an arrogant, high-ranking military officer who blinded himself in a stupid accident which ended his career. He is now bitter, lonely, and sad. His outbursts are fueled by his anger, regret and the total loss of his former life and independence. He has become so emotionally despondent that he wants to end his life. I have to add, this is Al Pacino, and his acting tends to be over the top in most of his post "Godfather I and II" movies.
raywest ★