Gee, I know what you mean, No.1 son wakes me up with a claw up the nose.... I reckon there are other cats out there in the night and yours had a set-to with one once, so is cautious about going out in the dark. As you know, cats are real creatures of habit, I'm afraid you are going to have to break him of this one. Choose a night when it doesn't matter if you don't get much sleep, and just ignore him - boot him gently off the bed each time he jumps up. I love your description - sounds like a real Simon's Cat to me!