In the scene where Jerry and his manager are at the restaurant, the waitress brings Jerry a full soda, then she sits down and takes a drink while babbling about her boyfriend and a job. When she puts the soda down, there is some gone (of course she just took a drink.) However, when the camera zooms out, the soda is even fuller then when she brought it to him. Later, when the camera zooms out, it's half empty. Where did the soda come from and where did it go again?