It usually comes after the nightmare, which is like drowning in a sea of d-darkness. It makes your skin crawl and your hands shake. Like you don't know which direction to look because you can't see it, but you know it sees you p-perfectly clear. A sense of foreboding washes over you too.

[ He'll swallow thickly as he looks back at Rei with a sad smile. ] I-I'm sure it's different for everyone though.