 because any mortal who claims to know how he'd respond to that is a liar. You should run, Brendan. He did decide to look behind him, and that's when he saw it. I'd describe what he saw, but what it looked like to him isn't important. Imagine you're in your bedchambers late at night, and you put out the last light. A sliver of moonlight creeps through the window and spills onto your bed.