In this chilling episode, we dive into the eerie events surrounding the infamous Mad Gasser of Mattoon, a mysterious figure who terrorized a small Illinois town in the 1940s. Residents were struck by strange, gas-like fumes that left them debilitated, leading to widespread panic and a hunt for a perpetrator who was never caught. Was it a mass hysteria, or something far darker at play? Join me as we unravel the strange history, bizarre theories, and unsettling encounters of one of America’s most puzzling unsolved mysteries.