Because: Terror in St. Petersburg

Bo turned around and watched what was left of the once-magnificent hotel. He could see fires burning in several areas of the charred building. What Davis had pointed out was the almost slow motion collapse of the hotel. Where the main blast had occurred, there wasn't much fire,just a gapping hole. The floor above was falling into the area where the destruction had started. It, in turn, was falling into the floor below it. It looked to Bo as if a hellish mouth had opened. Flaming mattresses and burning furniture were falling like spit from that devilish mouth.