Beginning on January 30, 1962, at a mission-run girls' boarding school in Kashasha, Tanganyika (now Tanzania), three students started laughing uncontrollably. The laughter spread rapidly, affecting 95 of 159 pupils, then villagers across the region, closing 14 schools and impacting over 1,000 people. Symptoms included crying, restlessness, and fainting, lasting from hours to months. It occurred shortly after Tanganyika's independence amid social tensions. Medical investigations found no organic cause, attributing it to mass hysteria triggered by stress.

This African mass hysteria event highlights postcolonial anxieties and collective psychology, inspiring African literature and poetry exploring communal trauma and joy's darker sides. It parallels folklore motifs in Swahili and East African oral traditions, influencing modern poets addressing independence-era identity and psychological ruptures. Similar to how European hysterias fed Gothic tropes, it enriches global poetic reflections on the irrational in human societies.