I actually did see a large section of the audience stand on their seats at the end of a Judy Garland concert at the Palace shortly before she died. Not only were they on the seats, but some were perched on the arms of the seats. The audience was in a frenzy. It occurred at the end right after Over the Rainbow. Before she sang the last note, she stopped and said, "I'm not sire I can make it." Then she sang the final note and the audience went wild. I had never seen anything like it before and I have never seen it again.