Here at last, and there's not much to report. I kept it steady, started a bit slow (what's new?) and then just kept grinding away for 30 minutes. I was pretty steady except when I had to get back on the bicycle when I fell off out of surprise that the USA managed to score a try (they didn't play badly, actually - just no match for Scotland). No numb feet, no "hills", and some patches where it wasn't too difficult. For my efforts I burnt about 500 calories.
Hah! Onward and upward.