Emmy winning actor Jeremy Piven was getting serious amounts of cash for his appearance in a Broadway play, "Speed the Plow," by David Mamet. He had to leave the production due to a high mercury count in his system. The director has called the ailment, which can actually turn deadly, bogus, despite orders from a doctor (acting/directing schools typically do not have an MD program) to stop working and seek treatment immediately. Mercury, though almost always present in trace levels in the human body, is a very toxic element and it has deadly side effects from exposure to even small amounts. If you want to find out what would cause Jeremy Piven to turn down so much extra cash, check out this article.