[NewChief]

Originally Posted by KC_Connection

Spidey sense...or he realized that it was Walt that actually poisoned the kid to get to him.

Salon had an interesting explanation for that scene which I'll post. The reviewer was sort of down on this episode, though, but anticipating that the next episode will offer a plausible explanation for its events.
http://entertainment.salon.com/2011/...ur_episode_12/

Consider the parking garage scene at the end of this episode. While I found it a bit hard to believe that Walt would be able to find a rooftop spot that gave him a clear and precise view of Gus’ rigged-to-explode car — what if Gus’ men had parked on a side or a floor of the garage that could not be seen from an available rooftop? – I found the rest of the scene quite credible. I read some complaints last night that Gus’ sudden decision not to get in his car was too mysterious — that it made him seem like too much the arch-criminal, feeling bad stirrings in The Force and acting on them.

But those complaints are shortsighted. His behavior here was classic Gus, totally consistent with what we know about him.

Why was Gus at the hospital? Because Jesse demanded it, with a stubbornness that he had never expressed to Gus before. It seems quite plausible that Gus would leave his conversation with Jesse pondering the circumstances that led up to it. Maybe as he made his way back to the car he thought something like, “Why did Jesse insist that I come here? He’s never disrespected my authority so flagrantly before. Maybe he made me come here so that he could kill me. And since the car was left unattended, a person — for example Jesse’s partner Walt, a brilliant chemist and tinkerer — could easily accomplish that with a bomb.” When he surveyed the skyline around the garage, I don’t think he knew where Walt was, or that he was even looking for any one person in particular, or that he knew there was a bomb in his car. I think he just wanted to see if it was possible to monitor what was happening in the garage from somewhere else downtown. Once he realized that it was in fact possible, he turned around and walked out. It doesn’t matter if suspected car bomb, a sniper attack or some other threat. He just thought there was something fishy about the entire meeting, and that it was better not to hang around in the garage any longer.