[Gator113]

I didn’t think that the black box reveled anything, because there was no collision.

[Gator113]

reveled=revealed

[Paladin2]

"brakes and accelerator were depressed about 250 different times during the incident.”

These so called Black Boxes are likely just data stored within the multitudinous microprocessors on board. Since there are two brake systems and two propulsion sources and various combinations of which ones are in use, it's possible that some combination of rapid inputs could confuse the complex hardware operation. The new inexpensive memory chips could easily hold data from the last hour or more.