The 1997 film by James Cameron about the tragic sinking of the massive ocean liner is also the story of a rich passenger, Rose DeWitt Bukater (Kate Winslet), and working-class Jack Dawson (Leonardo DiCaprio), who meet despite the stringent class separation on the ship. Winslet and DiCaprio ad-libbed the scene early on in the film in which Rose thanks Jack for saving her life, and the scene in which Jack teaches her to spit was almost entirely improvised as well. The water in which Winslet and DiCaprio both spend much of the second half of the movie was from the Pacific Ocean and was incredibly cold – DiCaprio shouted "This is cold!" and Winslet gasped as they got in, both unscripted. Cameron left the reactions in the movie.
