More than a little bit alarming and confusing to witness. Bush was visibly upset, and I conjecture that he is completely unaccustomed to speaking with people who disagree with him. (An occupational hazard for any President, to be sure.) But this imperial air doesn't explain how he could seem to completely run out of material halfway through. The most plausible theory I've heard is that Bush's hidden earpiece was malfunctioning, so he wasn't getting his lines.