Jeremy Piven fakes his own illness?

Jeremy Piven has ticked off the Broadway production, Speed-in-plow. Apparently when the show was sucking, Piven got a note from his doctor that said he had mercury poisoning and could no longer perform. More from the AP.

They have filed a grievance with Actors’ Equity Association, the stage actors’ union, against Jeremy Piven for abruptly leaving the Broadway revival last month.
Piven quit the David Mamet comedy less than two months after it opened to favorable reviews at the Ethel Barrymore Theatre. The actor’s doctor said Piven was unable perform because of high levels of mercury in his system, possibly caused by eating large amounts of raw fish.

The note also said that Piven could no longer participate in P.E. class.