Man Eating Sandwiches

Man eating sandwiches are a monster often found in various resturants and sammich shops. They appear out of random, and take the form of the most delicious sandwich in the world.

People see these sandwiches and go "oh god that looks like the most delicious sandwich in the world", and so they try to eat it. Once you pick up a sandwich, it has been given permission to bite your head off. Only the head, they don't like any other parts of people. They are completely docile however if they are not picked up, and for this reason less and less cases of "death by sandwich" are occuring due to people realizing that THERE IS NO MOST DELICIOUS SANDWICH IN THE WORLD, and so they push it into the trash, where it shrivels up and dies.

The few people who have managed to eat the sandwich before it eats them (usually wizards and REALLY FAST PEOPLE), say that yes, it is the best sandwich in the world.