>>95901993
Black Shuck
A completely black dog the size of a horse or cow with a glowing red eyes. Seen by coach drivers since middle ages. They attempt to cause crashes or accidents by howling, attacking, or just running in front of the driver who swerves to avoid it. Usually happens are night, but there are reports happening at all times. Still seen to this day. I know this because I actually have seen one. Longer story than worth writing but many long haul drivers will tell you they've seen the black dog. They jump in front of your truck and disappear.
Ghost? Demon? Could be both or neither. Doesn't help there are hundreds of black dog stories.