There were several funny moments in the movie, intentional or not, but when Keanu is bashing The Game with a phone book repeatedly, and The Game says: "You have to ask a question first!", then Keanu makes the question, and keeps hitting him, and The Game says "Let me answer it!", I almost had to pause the movie because my laughs weren't letting me hear what was next. A true Crowning Moment of Funny.
The scene with Ludlow logging in the complaints - he's obviously out of his element and his growing frustration is practically palpable.