A man, a plan, a cookie jar with a upside-down legend
Liz: What's with the cookie jar?
Jack: I collect them.
Liz: Really? Is that some sort of unresolved childhood thing?
Jack: Nice try. We never had any cookie jars in my home because my mother never baked us any cookies, because she felt we never deserved any cookies. So obviously it has nothing to do with my childhood.
Liz: But that cookie jar says "Mom" on it.
Jack: I don't think so. I've always viewed it as an upside-down "WOW."

It would be the first documented instance of him actually using magic
Kenneth: [brightly reading from a list Liz obviously prepared] You going to give up on this like you gave up on your relationship with David Blane?
Jenna: He's the one who drove the wedge with his magic!

I only caught that joke because I was wearing my glasses Shortly after a discussion with Jack wherein he theorizes that Angie will punch Liz in the face, Liz goes down to kick Angie off the set. She takes off her glasses before doing so.

Tracy becomes a man. Next stop: werewolf!
Tracy: Do I have to fix this situation? I am the immature one! But the both of you? You're forcing me to act like an adult. An adult! And even worse, you're making me stop two ladies from going at it.

And here I thought ceramics got broken owing to family conflicts, not collected
Kenneth: Look at that kooky old cookie jar! I like the upside-down "WOW" on it.
Jack: [looking like he's just seen the first rays of dawn after a very long night] You like cookie jars, Kenneth?
Kenneth: I guess I never thought about it that much. We had a nice one back home in Georgia. Had a bear on it. [darkly] I remember when my mom's friend Ron would come over. They'd go into the bedroom to sort out their paperwork, and I'd just stare at that cookie jar. It was almost as if I took every problem that I ever had, and put it inside that cookie jar. And I sealed it up so tight, nothing would never, ever, ever get out.
[Jack looks on with a mixture of trepidation and hope, then shakes his head as if he's in perfect understanding. ] Kenneth: [brightly] So, I guess to answer your question, I give cookie jars about a "B."