The broad picture -- Why develop a critical eye -- The American picture -- Was there really a Martian panic in 1938 -- The Roswell "flying saucer" crash of 1947 -- The Mad Gasser of Mattoon : press creation of an imaginary criminal -- New England's great airship hoax -- The cross-cultural picture -- What is normal -- Latah : strange mental disorder or exotic custom -- Exploring tolerance : religious devoutness or bizarre ritual -- Genital-shrinking scares -- The historical picture -- The dancing mania of the middle ages -- The jumping Frenchmen of Maine -- The birthplace of the flying saucer -- England's black helicopters -- India' monkey man mania -- How to recognize mass delusions.