Charles VI of France (1368-1422) was daffy.

He thought he was made of glass and had steel rods inserted in his robe so he would not shatter.

During a wild party on January 28, 1393, Charles and five of his knights decided to ‘pull a fast one.’  They dressed as wild men of the forest in disguises of wood, resin, and weeds. They chained themselves together and danced about the ballroom. 

Until the brother of Charles, drunk as a skunk,

held a torch too close to one of the disguised knights.

In an instant, all knights were ablaze, and Charles barely survived.

After the fire, his mental capacity declined

and he became known as Charles the Mad.