It was only luck, if you could call it luck, that Carter thought to shine the flashlight on the ceiling. Your average soldier wasn't trained to think that his enemies could fly, or walk upside down, but Carter had seen a variety of the institute's bizarre offerings. The last time he hadn't checked the ceiling a giant bat had bitten a chunk out of his back.

So when Carter's flashlight made another pan of the wide, twisting hallway he managed to catch a glimpse of a dark, carapaced form surging across the ceiling. "Look out!" he yelled, pointing upward with his crowbar. "Look up there!"