Petty never did much antics on stage if any at all. Blame the rockstar lifestyle if you will and a combination of issues with aging. Nevertheless it is tragic. I have seen him live many times and the last time with the Hypnotic Eye tour a few years ago - he did not look well at all at that time. Such a great talent and passion for song writing. His songs spoke to so many perhaps his single greatest talent was a profound insight into the human spirit and joy/pain of living.