sentences:  In one tale a pair of men who encountered the dog saw a burst of flame before it appeared in front of them, big as a Newfoundland with the usual burning eyes and long sharp teeth.After a few minutes it disappeared, either vanishing like a shadow or sinking into the earth.In Norfolk, Suffolk and the northern parts of Essex, a black dog known as Black Shuck (also Old Shuck or Shock) is regarded as malevolent, with stories ranging from terrifying people (or killing them outright) to being a portent of death to themselves or a person close to the victim.