Boards
Top 5 Mass Psychogenic Attacks
What? See here:
1. http://en.wikipedia.org/wiki/Tanganyika_laughter_epidemic
2. http://en.wikipedia.org/wiki/Dancing_Plague_of_1518
3. http://en.wikipedia.org/wiki/Fan_death
4. http://en.wikipedia.org/wiki/Genital_retraction_syndrome
5. There is no five.