The impression I was left with was he was going to give the answer he wanted even if it was obvious to anyone paying attention that it was to some other question. He reacted badly to any attempt on the interviewer's part to steer him back on topic. It looked like he was afraid if he got interrupted, he'd forget where he was in the rehearsed 'answer'.

That whole pat-on-the-head thing doesn't work when the people you're patronizing are dumber than you.

(Gotta remember 'My job is to do my job' though.)