Someone is angry
Just a small note, though I love the trope of third class being locked inside the Titanic, there's little to no proof that this really happened. It's true that at the final moments of the Titanic, a group of hundreds of people from third class emerged on deck. The theory is that they were lost in the corridors because the Titanic was like a maze, especially in steerage.
But I couldn't resist drawing an angry Brian raging against a steward.