Once had to drive someplace with my brother, but in separate cars. He was taking his car, and I got to follow in our mum's family van.
90% of that drive I was flooring it, and generally driving like a racecar driver ...except that I was still moving at a snail's pace.
Of course, upon arrival my brother started giving me shit for going slow. And he did not believe that the car couldn't go faster. So, we agreed to swap cars for the drive back home.
Never had I seen him concede so readily that he was wrong. 🙃