A 26-year-old male, an unmarried rickshaw puller working temporarily in a jute mill in Nodakhali, southern West Bengal, presented to the psychiatry outpatient department with persistent fear for 2-3 days that his penis was shrinking into his abdomen which was making him progressively weak. He became intensely anxious and was unable to sleep well at night and repeatedly brooded over the thought. He denied any addiction or habitual intake of any psychotropic drugs, while his informant and medical records failed to show any premorbid psychiatric illness. He thought his symptom was due to his recent nocturnal emission and masturbatory practices. He promptly reacted by immersing himself in a nearby pond for 14-16 hours overnight which resulted in symptomatic chest infection in his lungs. His action quickly gained recognition in the inhabitants of the nearby worker's quarters. Two days following the event, six laborers presented with similar symptoms and they promptly followed similar preventive measure as well. None of the cases could qualify for any other codable Axis I diagnosis. The occurrence led us to arrange for a small medical camp in the vicinity to spread awareness and group psychotherapy, and the outbreak subsided after 5-6 days.