Police Officer: No sign of forced entry. I just don't see how these guys got in.
Hal: It's a mystery.
Dewey: You left the window open.
Hal: Mystery solved.
Police Officer: I'm sorry, what is it you say you're doing here again?
Hal: We're watching the cat while the owner's away.
Police Officer: I don't see a cat.
Hal: We're not doing a very good job.