In 1955 one man who was "feeling depressed" reportedly inserted a six-inch paper tube into his rectum, dropped in a lighted firecracker, and blew a hole in his anterior rectal wall. This changed his mood real quick.
FSM help me if I'm ever that bored or in that much of a funk. From this "Stright Dope" column. Read on to to see what other interesting things people have had removed from their recta.