This reminds me of the El Cid film where the Arabs were storming the Spanish castle, annd Charleston Heston played El Cid. It was rumoured that El Cid was dead among the Arabs (which was true) but the defenders placed attached a hard board on El Cid's horse and tied the dead body of El Cid (in full armour) to the horse. Then the 'El Cid' on the horse rode out with the Spanish cavalry out of the castle and the Arabs positive stance turned to negative. If Ozzy is to ill to walk maybe he will come out in a wheel chair to sing or will use something inorder to still attend and sing...?