I think what she was trying to convey was that the incident was so sick that she's at a loss for words. It is a very scary thought that someone would run down a cyclist on purpose, but maybe there's more to that particular story as far as someone knowing that person and targeting them because of that and not just because they were on a bicycle, not that it changes anything.
There are a lot of sick people and compassion-less people in this world, including the 2 young men who hit me while I was jogging 25 years ago and drove away laughing.