I did, this morning on ice in the bottom of a valley near Henley which has its own microclimate. Everywhere else on my route to work – the first time I have been able to cycle for over a week due to the cold, snowy weather – was ice free but descending into the valley, the temperature usually plummets and it certainly did today. An ice sheet covered the road from one side to the other. I was a sitting duck and when applying my breaks at the bottom of the hill, slid of and down the road. Ouch! A little bit sore but I survived! The guy in the picture had the right idea.