The whole dialogue exchange regarding the mysterious Cincinnati Incident:
Lou: Hey man, can I ask you a question? Does this seem like it's all about Adam again?
Nick: Yeah, just like Cincinnati.
Adam: You're gonna bring that up?
Lou: *suddenly dead serious* We said we weren't going to talk about Cincinnati, ever. Okay?
Jacob: Is this why you have a shoebox in your closet that says "Cincinnati"?
Lou: What?! That shit's admissible!
Nick: You keep it in the closet?!
Adam: What else am I gonna fucking do with it? You can't bury those things!
Nick: You wrote "Cincinnati" on it?!
Adam: How do I know which one it's supposed to be?
Jacob: ...Is it a fetus?