After one brief attempt for both of them to balance on the door in the water, Jack bravely shimmies off into the freezing water to give Rose a better chance.
Rose and Jack are among them, and happen on some of the debris that was thrown/came off of the ship as it was sinking.
James Cameron’s movie believes in romance and sacrifice, but Tyson told the Huffington Post he believes that in real life the will to survive would trump chivalry.
According to Neil deGrasse Tyson, that’s bollocks.