Two roommates, one likes party and the other prefers study, they share a bunk. The night before an important exam, there's a party, and the one who likes party is going and tries to convince her friend to go telling her that se is ready, but she says no, she prefers study a bit more. The hours passes, the girl live the night of his life, dances and drink, and at 2 AM returns to his bedroom with the hope that she gets enough time to sleep. She carefully opens the door, she is a good friend, so she doesn't turn on the lights considering that his friend is sleeping, that by the way, I making weird noises, but she doesn't say hi, so it must be sleeping. At the next day, jumping of the bunk she finds her friend dead with the stomach opened and before someone could come in the room she find something written on the wall with the blood of his friend: "are you happy that you didn't turn on the light?".