Mortimer Schnerd, RN writes:

Huh? I've only jumped once but I don't remember any negative G. Maybe zero G
for a second or two after you step off the step but no sense of falling. I
interpret that sick sense of in your stomach when I fall off a ladder as being
negative G... but there wasn't any of that with my jump.

Free falls are zero G, not negative G. Negative Gs are
physiologically hazardous, compared to positive Gs, so it's unusual to
see them deliberately imposed.

If you want a sample, though, you can ride on the Twilight Zone Tower
of Terror attraction at a number of Disney amusement parks. This
attraction is designed to accelerate riders downward at greater than 1
G, so they actually experience negative Gs on the way down (although
not enough to be hazardous).

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