Simple, they didn't know they weren't gonna be able to get off of it.

[Mr. White has his own beer, bottled no tap. Nothing special at all. And for once he didn't have to work today, so he's dressed well without the whole entire suit ensemble. Not that it matters. Queer line of thinking, isn't it? Samuel Adams tastes good tonight.]

I mean, if you saw a train would you be thinking about never being able to leave? Or how about an elevator for that matter?