That is sad. Sometimes bad luck/death will find you, no matter what you are doing. A few years ago I came along right after an accident had happened.
A man and his son were riding one bike and the wife/mother was riding another bike. She was in front and they were all making a slow pass around an 18-wheeler on the interstate. Just as she got even with the tandem of the trailer a black bear just instantly bolted out of the bushes in the median. The bear tee-boned the lady biker and knocked her and her bike directly into the path of the trailer wheels - right in front of her husband and son! The lady truck driver was so shaken that she just drove her rig right off the road and way over off of the right of way nearly into a field. That had to be a horrible experience for all involved. Speed, riding habits, nor weather were factors.
Sometimes your number is just up! (Live everyday as if it were your last on earth)