8x 400m Run

Wow, I have no posted in a few days. I apologize. I have been updating my online marketing sites in hopes finding more clients for my legal practice. Because of freezing weather and snow fall, I had to run on a treadmill yesterday. The Workout:

8 rounds of:
Run 400 meters
Rest 90 seconds

Post total time to comments not including 8th rest.

Time: 23:25

I set the treadmill on Max speed of 10.0 and thought I could go faster. However, by rounds 6, 7, and 8, I was dead. Why do I always think running wods with be easy?