In the film "Léon: The Professional," a hitman named Léon is tasked with convincing a fat man not to move into another gangster's territory. When the fat man arrives at his hotel with heavy security, chaos ensues as Léon takes out bodyguards one by one. He traps the fat man in a room, causing a showdown where the fat man tries to call for help. Ultimately, Léon gives him a choice between taking drugs or facing consequences. The scene is filled with suspense, action, and a tense game of cat and mouse between Léon and the fat man.