I'm currently working away from home for a couple of days, I was just heading out of the hotel for my run when I passed the gym and thought it might be a good idea to try running on a treadmill (which I'd not done as part of my c25k).
What a mistake, that was horrible, couldn't concentrate and the monotony of staring at a blank wall became too much; gave up after 2.5k, never again, give me the open road any time!