He heard the doctor telling the Rosh Yeshiva that he has a growth in his foot that must be operated on immediately. Although the surgery would take a few hours the anesthesia would knock him out for the rest of the day.
The second story:
Once, while Rav Schach was sitting in the Bais Medrash, a man came over and whispered in his ear. Rav Schach began to cry, heartrending sobs. Later the man told the talmidim that he informed Rav Schach about a helicopter accident involving Israeli soldiers who were all killed. Rav Schach had such depth of feeling for every Jewish soul that he cried bitter tears over these soldiers he never met.
He didn’t cry over his own pain yet he cried over his fellow jews pain.