This kinda reminds me of a line that Ryan Stiles had during "The Drew Carey Show" once. In one episode, they were discussing how bad their friend Kate was at singing...
Lewis (Stiles): Ya ever start a car with a cat sleeping on the intake manifold?
Drew (Carey): Uhhh....no.....
Lewis (Stiles): Then yeah, that's the worst thing you've probably ever heard in your life.