He Did Not Feel the Blows

It is told that once, while Rav Shmuel was in the middle of davening, a man who was mentally unstable came into the shul and began beating him severely. The Rav did not notice at all, because he was completely immersed in his prayer.

When he finished, he asked innocently, "What was the noise here?" He did not ask about the blows, because he had not felt that he was struck.