As a kid, Joe had more than once accidentally wandered his way into nightmares. Before he really learned to control his ability to see and wander his way through other people's minds, it was almost too easy to get into the minds of those who didn't know they needed to keep people out. Nightmares, for whatever reason, seemed to exert a stronger pull.
Nightmares felt different from regular dreams. Colder and sharper, like the actual essence of them cut against his skin. When William's dream turned, from the swimming pool and the octopus to the cauldron and the panther, Joe shivered hard. Something cold crawled down his spine.
"William?" he asked quietly. "You need me to see what?"
When the piano started up, suddenly with a sinister tone it hadn't had before, Joe was more than willing to take off running and follow William.