A tragic thread I know, but as Mario Andretti said after Ronnie's death, "Sadly, this is also part of motor racing."
But please fellow members, let's keep our dignity, no gory images it you will.
I found this piece on the web on Jochen Rindt's death at Monza in 1970;
Jochen Rindt. Won the F1 World Championship in 1970, despite being killed at Monza. He was so far ahead in the championship, that noone could overcome him by season end.
Rindt had shown up at the Italian GP, expecting to be driving Lotus's older (and Rindt's more favoured chassis) the Lotus 49. Instead, Colin Chapman had gone against Rindt's wishes and only brought the newer, less stable and refined Lotus 72. Chapman gave Rindt an ultimatum...drive the 72, or don't drive, and risk losing the championship. Rindt chose to drive, and in practise, under braking for the Parabolica, the car snapped left, head on into the barriers. Rindt had failed to secure himself properly and was thrown down into the car. He was given the last rites at the crash site, but it is unclear whether he died on impact or lying at trackside.
The man never got to see the trophy he would ultimately win, and his Finnish supermodel wife Nina would never marry again, saying that no man could ever replace him.