Don't look. Don't look, you tell yourself as you huddle down in fear in your house.
The fire lights up the whole of the room from the window. You can see the blazing of it even through your eyelids.
It passes by, and you relax. You survived. Your head rests against the wall in relief.
Screams sound. You cringe, praying for those souls that were not so lucky as you.
The Wa Nyūdō is one of the deadliest yokai in the Japanese pantheon of them.
He's described as a flaming ox-cart wheel with a man's head at the hub. This man was -- according to two different versions -- either a nasty daimyo or a corrupt monk that died and is serving penance.
He works for Hell and loves to haunt urban streets for whatever victims he can find. This yokai haunts urban city streets. To look at him will have your soul stolen and taken to Hell. To fall into his path will have your body torn asunder.
One story had a woman looking at him. The Wa Nyūdō yells at her that if she had time to look at him, then she had time to look after her baby. When she turned back to the baby, its limbs had been ripped from its body by the creature.
He appears in the Konjaku Gazu Zoku Hyakki in 1779, but may come from an older work called the Shokoku Hyakumonogaturi from 1677, which is a collection of ghost stories. Evidence suggests that this yokai goes back even farther to the Heian Period (794 to 1185).
There is a specific ofuda that protects against it.