Every now and then dancing mania article pops out here or there and every time I'm reading it I wonder how much of it is exaggerated after telling and retelling

Every now and then dancing mania article pops out here or there and every time I'm reading it I wonder how much of it is exaggerated after telling and retelling this stories or even as a warning of sorts that such 'dirty', spontaneous rave may be deadly so should not be performed by a righteous christian (considering that it happened mainly in Europe between 7th and 17th century)