I just thought of something today; Montoya’s onboard from the 2002 Austrian Grand Prix when Heidfeld lost control and t-boned Sato. It was probably one of the worst accidents I’ve ever seen and it scared me when I was watching it unfold as it was the first time I’d seen anyone injured in an accident. But Montoya, for those who can’t remember, was missed by the out-of-control Sauber by millimetres.
Here’s a screengrab of the footage highlighting just how close it was:

The onboard from Montoya’s Williams must be terrifying. Sato’s would also be quite spectacular as it would be so sudden and shocking.