I was the same way, then one day I was running late and it was going to get dark in about 10 minutes, and I had to cover 10 miles still. I went down the hill in a tuck and hit 40!

Still there is traffic and I'm not big on downhills, personally I think they're overrated as a skill, but highly dangerous. I can't stand it when BF members post about thier downhill times like they take the same amount of work as a high end sprint or climb.