The ride home last night started out great. 50F and a partial tailwind. But after ~5 miles, I came to a 4-way stop and the guy to my left who had arrived a second before me refused to go. I continued to track-stand and jerked my head to the right while looking at him but he still didn't go. So I went. But during the track stand, my rear brake (a 25-year-old U-brake) became "mal-adjusted" and one of the pads was dragging. I couldn't get it to stay off the rim so I rode the remaining ~10 miles that way. It was very hard work and I was going very slow and I was trashed when I got home.