Two friends moved to New York, and because rent is so high, they had to share a studio apartment. Liz was a real party girl and Susie was a stay-at-home type. It was Friday night, and Liz was heading out for another wild night on the town, when she invited Susie to come along. Susie declined and said she was going to read and then go to bed early.

Liz had been out at the local bar for a few hours when she drunkenly decided that she needed to put on more lipstick. But she had left her lipstick in the apartment. Stumbling up the stairs, she quietly opened the door and went to get the lipstick without turning on the light, so as not to wake up Susie. It turned out that the lipstick did the trick and Liz found a companion for the evening.

When she got home the next morning, she opened the door and screamed. Susie's head had been cut off and was lying on the floor. Scrawled in her blood on the walls were the words "Aren't you glad you didn't turn on the light?"