....when one gets complacent about a stretch of fast A-road and then panic-brakes when the large oncoming vehicle on a right-hand bend passes to reveal a parked van on ones side of the road. I did at least have the sense to let off the brakes and yank the bars to unweight the front wheel as I went over the verge. Shook me up a bit, partly because I still don't know why I didn't see the van earlier-it's quite an open stretch of road, though the oncoming vehicle may have masked it, but also why I didn't just steer round it when I did see it. I am, to say the least, disappointed by my reaction to a real unexpected hazard. Still, stayed upright and regained the tarmac after a short bronco ride. Apparently no damage done and a lesson learned.