Warmed up for a mile, then did the "downhill death mile" attempting to run a sub-4. Because you lose 500 feet in elevation, it's more of a sprint. We used a couple Garmins to measure the distance, so it really wasn't too accurate. I ran under four, but it may not have been the most accurate. Ethan paced me on his bike and his bike's MPH was over 15 the whole time, so hopefully it was. Anyway, it was just for fun and wasn't too accurate. Ethan filmed it, but before he stopped it, the camera fell and the SD card fell out and so it didn't record it all the way. We might redo it so we can get a video and next time we'll try to make it as accurate as can be. After I paced Ethan for 4 miles of tempo, then we cooled down and ate crepes after.
Here is the garmin thing that shows all the information.