Sebastian Brant

Pretty specific.

An account preserved from material connected with Sebastian Brandt, who served as secretary to the Strasbourg Council, says the dancers were given red shoes.

Crosses were drawn on the shoes with consecrated oil.

The shoes were sprinkled with holy water, and the sufferers participated in religious rites associated with St. Vitus.

In the summer months of 1518, a lone woman exits her home in Strasbourg, France.

Under the watchful eye of the local authorities, she begins to dance.

Within a few days, she is joined by dozens more, dancing, jigging, crumping in the street.

The point is that ergot hallucinations could result in a diagnosis of devil worship, to be treated by 200 milligrams of some really good prayer.

This could explain the case of the dancing plague.

However, it's very unlikely that ergot-infected individuals would have danced for days on end, let alone until they dropped dead.

If you've ever seen someone have a motor seizure, you'll know that it doesn't look all that much like dancing.

Mass Psychogenic Illness, or MPI, formerly referred to as mass hysteria.