I re-watched the phone call scene last night. Man is that a great piece of television. Bryan Cranston eats the scene and trouts emmys.

Its so complex. There is obvious subtext to the over-the-top-heisenberg things that Walt is saying to her, but I feel there is some honesty to it as well. Particularly his line about her telling Walter Jr what he does. We've seen Walter do this before. He can't simply express his emotions unless he can mask them under some 'move' or ulterior motive.

( Another possible example of this is when he confesses to watching Jane die to Jesse. He's obviously angry and blaming Jesse for the death of Hank, but I think he was also trying to finally release his guilt he's been carrying in what could possibly be the last time he sees Jesse alive. )

Watch Walter's demeanor up until Skyler's apology. This is the point where he turns from poker face to practically breaking down while he's spouting his threats.
The line "You're never going to see Hank again" is heartbreaking.