When he was about 80 (I don't remember exactly when this happened) he drove with Pops down to Nashville, Tennessee where Dad was working a trade show. They got to the hotel; Dad got his luggage from the trunk and Joe drove on. He was going to visit some friends in Alabama while Pops did the show.
Returning to Nashville a few days later, Joe got completely turned around and had no idea how to get to Opryland, where his son was staying. Now bear in mind that this was before any sort of GPS or cell phones. He could not simply plug an address into a small computer. He couldn't just call Dad (who would probably not have known how to help him anyway) while asking for directions is always an iffy proposition. It could become rather confusing no matter how well meant. But Joe had an inspiration that day. He hailed a cab.
Not that he was going to ride it of course; he still had his car to consider. But he explained his predicament to the cabbie, told him where he wanted to go, and asked if he could follow the cab there, whence Joe would pay him as though a regular fare.
So that's how Joe got to the hotel to pick up Pops. I for one think it a work of minor genius.