"Probably Halloween candy, if I had to guess," Autor says, and then falls silent for a while to search for a door.

He doesn't find one, but the hair on the back of his neck stands on end when he feels he's being watched. He stops crashing through the underbrush, and hears something brush against a bush that isn't him or her.

"Bonnie," he says, reaching out for her arm. "Do you... Do you hear that?"