You're enjoying a movie, a TV show, a book, a comic when suddenly out of nowhere one of the (presumed non-smoking) characters lights a cigarette without any real reason. It's not part of the plot, it doesn't tell you anything about the character or it is in fact the first time in the entire work that a character is revealed to be a smoker. Often, the character will never light up again, and their smoking will never be discussed again. Welcome to the world of Random Smoking Scenes. Most of these random smoking scenes are just included in the story because...