Titanic (1997): The title of the film, "Titanic," suggests a story about the tragedy of the Titanic's sinking. However, the film focuses primarily on the fictional love story between Jack and Rose, and the sinking of the ship is treated more as a backdrop.
The Sixth Sense (1999): In this film, Bruce Willis plays a child psychologist who is trying to help a young boy who sees dead people. The irony is that Willis's character is actually dead himself and doesn't realize it.
Fight Club (1999): The protagonist, played by Edward Norton, joins a secret underground fighting club as a way to escape his mundane life. However, he soon finds himself drawn into a much darker and more violent world.
Memento (2000): The film tells the story of Leonard Shelby, a man with anterograde amnesia who is trying to find the person who killed his wife. The irony is that Shelby's condition prevents him from forming new memories, so he must rely on notes, tattoos, and other external reminders to remember what has happened.
Unbreakable (2000): The main character, David Dunn, is a security guard who discovers he is unbreakable after surviving a train wreck that kills everyone else on board. The irony is that Dunn had always believed he was ordinary and unremarkable, but he is actually the opposite.