Counting Sheep

Counting Sheep is a flash screamer. It asks you to count cartoon sheep jumping over a fence while warning you not to fall asleep, but, after five sheep jump, it shows a flurry of pictures of injured sheep and sheep carcasses over a roar before cutting to the credits frame, which also has text saying "LOSER." and "omg you suck" (as well as a button to play again) on it.