John left the stage without a word about two hours into his Sunday concert. He was gone for about five minutes, the Australian Associated Press reported.
When he returned, the 59-year-old pop star used an Australian colloquialism to explain that he had left the stage to vomit. "I thought I'd better chunder in the toilet (rather) than all over the front row," he was quoted as saying.
Apparently feeling better, John closed the show about 45 minutes later.