My dad, his parents and all his siblings were in the grandstands but escaped uninjured. He was 7 years old. Mltiple decades later he would become emotionnal and angry if we, as adolescents, would mention dead bodies in a very casual manner, for exemple while commenting on a video game.
I knew about this accident and them being close to be hit by some of those parts that day but it took me years to make the connection between this and how his reaction. This must have been a huge war scene.