Once I was woken up by feeling like someone was pulling on the collar of my pajamas, just behind my neck. I ignored it, went back to closing my eyes, felt it again and woke up. And here's the funny part: there was no one there. No one had entered my room that morning, and it was 6 in the morning. I'd call that pretty creepy.
But what you saw looks more or less like a trick played by your eyes. When you're eyes don't adjust quickly from one lighted environment to another, you sometimes can see almost a glow. It's pretty common, actually.