In the story "Old Man of the Temple" by R. K. Narayan, what experience does the narrator have in the Taxi on his way to Kumbum?

He had a supernatural experience during his ride in the taxi as the old man’s spirit possessed the taxi driver. The old man’s spirit refused to believe that he was dead until the main character was able to prove otherwise. In the end, the old man accepted the truth and the knocking at the temple stopped.