That guy that burned up had a bad day!
I raced Triumph TR-3s back before fuel tank bladders. Cars went up like grenades back then, and I watched several drivers get BBQd. We used cotton driving suits dipped in borax as flame retardant.
There was a major leap ahead in the 1960s in safety equipment that saved a lot of lives and injuries...Nomex, fuel tank bladders, full-across role bars, the better Bell helmets, five-point seat belts...
These showed up all about the same time and about the time I quit after watching a friend burn to death at Riverside.
That was quite a compilation and sometimes hard to watch.