Make three first-level saving rolls based on your Dexterity. If you make all three, you are safe but exhausted. Reduce your Strength by 4 temporarily (You may rest to get it back, but don't forget to roll for Wandering Monsters while resting). If you only miss once, you got grazed by one buffalo. Take 1 die roll of hits. If you missed twice, you got trampled. Take 3 dice of hits (roll three dice and take that many hits.) If you missed all three, you were smashed to dust. If you survived, you may leave through the West Door, or you may leave through the East door.