You shouldn't distract the guard when entering the office building.
Mario often chats with the guard at his office building, and they will sometimes exchange jokes in the morning.
Mario wants to tell the guard a new joke.
Mario tells the guard a short joke before entering the building.
Mario tells the guard a really long joke which takes his attention off of his job,.
Mario and the guard have a short laugh before going back to their respective jobs.
While the guard is listening to Mario's joke, an unauthorized man enters the office building.