If a bird flies into the house, someone will die soon. If you hold your breath while you drive by a cemetery, evil spirits can't enter your body. The soul of a dying person can't escape the body and go to heaven if any locks are locked in the house. If a cow raises its head and smells the air, someone has died nearby. If rain falls on a funeral procession someone related to the deceased will die in the near future.
Rain falling upon an open grave means bad luck for the family.
The soul roams the vicinity until the casket is finally covered with earth. If you've got deadly superstitions to share, send them to The Tombstone Traveller's Guide. Due credit will be given.