The Simpsons star told Conan O'Brien that he got his vocal cords insured after straining them one too many times. “My voice blows out rather easily, so I have to watch it,” he said in his Conan interview. “I was having a rough time in my life, and I got into a screaming match with someone. I totally blew out my voice, and it didn’t come back for almost two weeks. I scared myself so bad that I got my vocal cords insured."