Not that I wish anyone hurt, I do wonder if there isn't some abandonment of common sense - moving things result in accidents, there's no way to prevent that, and if you don't want to get hurt don't use them. For example, I was cycling through a large park this evening, empty because the weather was gloomy and it was a Saturday evening. Cars, cyclists, walkers and joggers use the road through the park but only myself and one other cyclist were on the long straight heading towards each other. When he was about 20 meters in front of me he suddenly fell into the grass on the side of the road. No potholes, no animals, no gust of wind, no broken parts, ... just over he went. A lapse of concentration? No idea. He climbed back on and continued. Point being that even with perfect conditions people still manage to come a cropper.