9 Strange Cases of Mass Hysteria
They began experience Tourettes-like symptoms, including painful tics and spasms and vocal outbursts. The girls all went to their doctors, but no physical or medical cause could be found. The high school the girls attended was tested for potential environmental toxins, but none were discovered. And finally, it was determined that the 12 girls who experienced these debilitating symptoms were actually suffering from mass hysteria.
(Source: thefrisky.com)
