"If you jump, I jump."
The idea is established the first time they meet. Jack says he is involved now. He will have to jump in after Rose if she dives off the ship.
Later when he wants to hear her say she will be okay, it comes up again.
"If you jump, I jump, remember?"
Trailer: https://m.youtube.com/watch?v=jUm88F3MEbQ
Even later when Rose leaves her rescue boat, back onto the ship, back to Jack, "If you jump, I jump, right?"
From the start we have planted a union, we solidify it, then we stand upon it. A motif built from spoken words, from an idea.
Great use of repeated dialogue in a classic film.
IMDb: https://m.imdb.com/title/tt0120338/
Written and directed by James Cameron.
Be well.
LionSuit.com
(words are original. image is open and free use from pixabay. posts may also be shown on my hive.blog page.)