Six years ago, Karl … sat alone in a parked car with 100 pounds [45 kgs] of dry ice and an obsession to destroy his legs. “The first thing I did was I used a wooden flour scoop to scoop some granulated dry ice into the bucket. … It filled the wastebasket with carbon dioxide gas, which was 79 degrees below zero,” he said. Over the next 45 minutes, Karl put his legs in the wastebasket and then kept adding dry ice until it got to the top. “I spent the next six hours well-packed in the dry ice, and then I’d add more dry ice to keep it topped off … After those six hours, Karl calmly drove himself to an emergency room, using the automatic hand controls he had installed in the car. Within days, his legs began to blacken as the frozen tissue died away, and within a month surgeons had no choice but to amputate both of Karl’s legs.