The Satmar Rebbe would dance for hours on Simchas Torah and people would come from all over to watch. He had a lot of health problems with his leg and his doctor told him that he must take it easy with the dancing.
The doctor heard on Simchas Torah that the Rebbe was dancing as always, so he went to the Beis Medrash to beg him to take it easy. The Rebbe told the doctor not to worry about it because the gemara says that Shmini Atzeres is a רגל בפני עצמו - It's own independent regel, so it won't affect his regel.....
