How about that bookend effect the scene in the cold open provides?

Walt is discussing Holly on the phone, except this is a happy conversation and the main concerns are pizza and naming their child.

Flash forward 20 months and Walt is again having a conversation on the phone with Skyler about Holly. However this is a very different, darker conversation. As its been said, this is his goodbye and really the only good deed he has left to do for his family.

This show fascinates me.