He played a show in London when he was sick as a dog too. Two-hour show and no one knew the difference. It was only afterwards that people heard he'd been sick all day and had cancelled all of his interviews so that he could do the show. I saw one of the PR guys after the show and he said Ronnie had spent most of the afternoon with his head over a bowl of boiling water.
10/12 Black Sabbath
18/12 Black Sabbath