Just ridden home late from work. I saw the little ice crystals forming on the ground, reflected in my headlights, before I heard them crunching under my tyres. My legs, insides of elbows, and teeth hurt from the cold. I followed a fox along the river Taff for a little while, negotiated a stile, and was doing about 15kph through a cul de sac, thinking how I would post a message on the forum saying This is why I do it, when I heard a scraping noise, then found I was bouncing on my arse. So I lay in the ice for a little while, thinking about what I had learnt. Got back on the road and gave it some stick. By the time I got home I was toasty and warm. Physics lessons, wildlife, slapstick humour, exercise, solitude, speed, twice a day, for free, for life. What more can you ask for.