Ehm... I first have to say that I am italian and obviously I have seen the movie in italian.

When Rose wants to throw herself into water, she's in the STERN (i.e. back part) of the Titanic. But when Jack tries to take her hand and save her, he says the word BOW (i.e. front part).

He should say something like: "Well, I'm not the one who is hanging on a ship's bow".