Heiji heaved a sigh. "I know, I know. But I couldn't find one of those anywhere. As a backup, though, we can prop something up against the outside of the door if we need to. As long as it ain't smart enough to try untying the rope, we should be okay."

He smiled. "Course, once it's in there, I'm gonna do my best to make sure it can't get out. You seen the way some of 'em are running around with exposed wires and so on, right? I figure cutting a couple of those should keep 'em from being able to use their arms."