At about 15:35 EDT, a Mooney M20E was destroyed during a forced landing near Prattsburg. The pilot suffered serious injuries and the passenger received minor injuries. The pilot said that, in cruise flight, he heard a loud bang and saw what appeared to be a piece of shrapnel go by the windshield. The airplane started to vibrate, and the pilot performed the forced landing to a hilly field. Inspection of the propeller and the surrounding vicinity revealed that approximately 1 foot of one propeller blade was missing.