BTW, I would suppose that the reported feeling of “shocking acceleration” might be due to the visual sensation of the onrushing ground, perhaps, or a passing structure, depending on the circumstance. This is physically no different than the experience of diving into water from a height, of course, but the subjective experience depends on more than the physics of free fall.
IIRC, the ex-jumper said he jumped at night, and remarked about the rush of the wind.