Best potential answer to Olivia's question to Walter, "What the hell is wrong with you?

• Too many trick-or-treaters through the years. Turn about is fair play.

• What's wrong with me? What's wrong with you! We had loads of fun when you were little, wearing a variety of wires on your head at any given time.

• Nothing. Sacrificing a little childhood safety for the knowledge of how the universes interact seems inevitable.

• Why did we stop calling you Olive? That was a super cute name.

• Oh Good. Does this mean you get an infinite number of snide comments in the time to come? Sweet.