I managed to break a neck of femur while turning up a hill out of the saddle (DERV on the road). Twenty-something years ago. They considered a hip replacement but decided to screw it instead. I was out in a week or so, on crutches for a few weeks, then sticks for a while, but not had a problem with it since apart from the odd twinge. I'd already broken both femurs on a motorcycle a few years earlier so maybe I'd notice the hip more if I wasn't distracted by that.