I love Walt for the crazy plans he comes up with. The magnet thing was quite awesome. I wonder what he needed that machine gun for in the teaser but this probably be resolved only at the end of the season.
There's some interesting mirroring going on with Ted being scared of Skylar even though she didn't want any harm to come to him and Skylar being scared of Walt even though he wouldn't hurt her, either. Him saying "I forgive you" didn't really help matters in that regard, I figure.