Everyone’s focusing (no pun intended, really) on the Pinto; to me the relevant point is that just past S/F at Laguna the hill crests and that’s a terrible place to “slam on the brakes.”
That’s an almost guaranteed auger in anything not equipped with tons of ABS as you will lift the tail, lock the fronts and go bass ackwards.
... or I could read the title? “Sonoma Raceway”
Sorry, S/F there is flat as a pancake, but sweeps to the left. Still no idea why anyone would slam on anything at race speeds.