Jay, at the new Writing Pittsburgh blog, pointed out something that I hadn't focused on: Looking at recent events, it appears that Pittsburgh really likes explosions.
One ought not to jump to the conclusion that Pittsburghers are better at tearing things down than at building things up. Still, there is something to the notion that if Pittsburgh were anthropomorphized, it would be an stereotypical young boy, fascinated by loud noises, trucks, things crashing into each other, and himself.