I've been a connoisseur of fine explosions ever since high school, when a good time consisted of building a fire that we could then throw aerosol cans into. (And kids, if you try this at home, be sure to be ready to shoot the can with a shotgun, in case it just weakens in one spot and develops a leak instead of exploding – just watch for flying logs).
But did you notice that none of the buses in the foreground were damaged in this so-called "explosion"? This had to have been an inside job. All part of Bush's elaborate plan to invade Gotham under false pretenses, no doubt.
Thanks to reader Andrew for the tip.