About two miles into my six-mile ride to school, I remembered I had forgotten to pack my laptop charging cord, so I went back home since I had enough time. An extra four miles for my ride isn't bad. It was a tailwind on the way to class, so I had a headwind after turning back. The difference was more dramatic than I expected. Once again, a tailwind feels mild, and the corresponding headwind feels strong. And once again, I'm not as strong as I felt.