@therandallcarlson: Satellites have now filmed two hypervelocity impacts into the Sun. Because of the Sun's extreme mass, its gravity accelerates an incoming comet nucleus to extreme speeds, and the faster an object is moving when it plunges in, the more kinetic energy it releases. Randall raises a further question. If the Sun is only a quasi-stable star, could some mechanism inside it amplify the effects of an impact like this?