Frank and Casper sit talking in a café. Frank asks a waitress for a cup of coffee, because he'd been served coffee in a glass which makes him a bit dissatisfied. During the conversation between Frank and Casper, in the first shot the whole glass is full of coffee. In the next shot only one half of the glass is full. In the following shot, the whole glass is full again. A few moments later - still during the conversation - suddenly, the glass has been replaced by a cup of coffee without the appearance of the waitress.