Don't you just love it when you are riding with the wind, i.e. so you are perfectly aligned with the flow of the wind, and you hit a certain speed when you are moving at precisely the same speed as the wind? I hit that "sweet spot" on the way home today - booting along on the flat at 30mph, felt like I was hardly trying at all, and I started sweating buckets because I couldn't feel any air flowing over me at all - I was going at exactly the same speed as the tailwind. Wierd feeling, very surreal, but exhilarating! It only lasted for a mile or so before the wind changed direction and speed slightly.