My dad worked outside Paris somewhere (I can't remember where now). His drive home was fairly long, but usually uneventful. One night, though, when he came in he was visibly upset, and he wasn't someone who showed emotion much. Apparently, while he was on the highway and everyone was going at a high rate of speed, there was an accident right in front of him. He saw someone go flying from the car and onto the highway, and then be run over by several other cars. He pulled over right away, but there were a lot of other people who had done the same, so he came home. He was very shook up.
A few days later, the police came to interview him, I remember my mother acting as his interpreter because his French was not good. A couple of months later, he had to testify at a trial. Three people died in the accident. It upset him tremendously.