[Stanley Nickels]

I think people who criticize the writers for Walt's irrational reaction last night aren't getting the full picture.. Walt is losing control, and he's grown so accustomed to it that he reacts in panic at his impending fate, pressured only moreso by the recent hotel interaction with Skyler. You can't claim that Walt is some meticulous and methodical person other the recent chase scene, because that isn't the only incident in that episode where he reacts impulsively (which is supposedly not in his character's nature.) After being Mirandized, does Walt react by remaining silent, the prudent and appropriate action? No-- he reacts by calling Jesse a coward, in front of DEA agents compiling a case against him! It was a tremendous line, not only because it bolsters the idea that Walt is losing control (emotionally and metaphorically), but also because it elicits such a disdainful reaction from the audience, who sees it as ironic coming from a POS that just recently made a cowardly fake confession accusing his brother-in-law of making him (Walt) a fall-guy for a masterful drug cartel orchestrated by the head of a DEA branch.

I just don't see how you can conveniently ignore these gaping vulnerabilities shown in Walt's character throughout the season, to bolster an argument that it's "not in his nature". I can possibly see an argument that they started to assassinate his character only in this season so that it would better suit an ending to the show, but it didn't start in the last episode; it's been setting up for a while now.