Cow head is a scary story which can make you die from fright.
One day during a school trip which involved bus travelling, the teacher started to tell scary stories to entertain the students. When he started to tell a story called Cow Head all the students started to scream and beg him to stop but the teacher was in some sort of trance and he couldn't stop. When he recovered the bus driver and the students had fainted and were foaming at the mouth.
Some of them couldn't stop sweating and shivering and died a few days after.