Let's see dude to me in general he's a bipolar piece of shit. That he has other mental issues besides bipolar and I didn't mention them in my post is my problem. Because I was only referencing how I had identified myself in regards to his bipolar in the movie.
In any case and to shut your mouth that you are doubting that I didn't see the movie.
In the scene, He orders roast chicken, but becomes obsessed with how the chicken should be cut, and asks the waitress to cut it for him. He then becomes obsessed with the way the bread should be served, and asks the waitress to cut it again. Showing signs that he is a fucking obsessive-compulsive. He also shows signs of mania in this scene as he talks fast and seems to have too much energy.