Awesome commute until the very end when I hit the mental wall. 30F and dusk/dark with winds from the W @ 6mph. Normally when I stay late, I take the short way home even though it's much steeper, and now I know why. I decided to take the longer way to avoid the steep hill to my house, which ended up being a big mistake. I hit a mental wall and just had no energy for climbing that hill, even though it's a lot less steep than the other one. When I got to the flatter sections, I had absolutely no power and I could only cruise at slow speeds. It almost felt like I was carrying an anchor behind me. Besides that, it was a really great and enjoyable commute home.