Games, research, sneaking around in the dark like a brother, maybe going outside (:O), pretending to be like some kind of creature that crawls around in the shadows lol, chase your cats/dogs around in the darkness, talk to yourself, throw money into a ceiling dan then try to find it, draw pictures then look at them the next day, take a stuff in a bathroom with the light off, throw pillows onto the ground then try to only walk on them, pretend you're an astronaut on the dark side of the moon.
Oh yeah.