Later in the movie, when Marvin decides to ask for more money and takes a Polaroid of the Duke in the bathroom of the motel, he comments to himself: "I amaze myself... I'm always thinking."
The thing is, the character of Marvin is quite dumb, not a nice person and above all someone who never grasps the full picture -- but at the same time he has good instincts and is, in fact, a fairly good hunter. It's a dangerous combination.
https://www.youtube.com/watch?v=Gokkl2br7G8&t=152s
Later in the movie, when Marvin decides to ask for more money and takes a Polaroid of the Duke in the bathroom of the motel, he comments to himself: "I amaze myself... I'm always thinking."
The thing is, the character of Marvin is quite dumb, not a nice person and above all someone who never grasps the full picture -- but at the same time he has good instincts and is, in fact, a fairly good hunter. It's a dangerous combination.