Lily: So whenever you've been dating somebody for a while, I do the Front Porch Test. You know, how is this person gonna fit in with our group over the years? And when I think about Karen there...
[fantasy scene of elderly Ted, Karen, Marshall and Lily on the front porch:]
Marshall: Bridge! I win!
Karen: Fantastic. Another game of bridge. Don't read a book or anything.
Ted: Look, dear... dolphins.
Karen: They seem happy. I guess the chemical runoff from this elitist beachfront property hasn't rotted out their blowholes yet. It will. That water will kill you. It is a toxic deathtrap.
Lily: I'm gonna take a dip.
Marshall: I'll join you.
[present:]
Lily: Karen failed the Front Porch Test. She had to go.