Marshall: Oh, now this is ridiculous. Is it the nail?
Robin: Marshall?
Marshall: Is the wall slippery or something?
Robin: Marshall.
Marshall: Is there a wind? Is there some sort of draft in here?
Robin: Marshall!
Marshall: What?
Robin: Your apartment's crooked.
Marshall: What do you mean?
[Robin places the bottle of champagne on the apartment floor in front of her. It rolls all the way to the other side of the room.]
Future Ted: [v.o.] It was the kind of thing you didn't notice until you noticed it. But once you did notice it, you couldn't not notice it. Lily and Marshall's new apartment was crooked.