Ran 10 km (precisely 9.92km, 5th time) to Wisdom of Harry's Caesar Boot on auto-repeat. Watched with amazement when the guy on the next treadmill leaped off without stopping or even slowing down his machine, dashed to drink water, and then leaped back onto the treadmill at the same speed again. He didn't last long though. I always drink enough before I start running. Hmm.