There are some very inexperienced and/or reckless riders about.
I rode a sportive a few years back in very wet and windy conditions. I am usually not slow downhill, often hitting 50+ mph, but on that day conditions were not right so I kept my speed down to what I considered safe. I was getting overtaken (on both sides!!!) by people doing at least 20 mph more than me. I thought it was crazy at the time and I was speaking to one of the organisers afterwards who said that at least 2 riders came to grief on this bend ...
You can see it coming from way back, there are an S-bend sign, several SLOW warnings on the road, a big chevron sign, and a road which very obviously snakes round to the right between 2 reservoirs. Despite that, riders failed to make the bend. One slammed into the wall. The other was found later behind the wall with a broken leg - he had been launched over the wall when he hit the kerb at high speed, breaking the limb on the top of the wall as he passed over it.
BONKERS!