A section of the videotape of the Paris Airshow of (around) 1987 or so
includes the HUD display of an F16 flown by a company demo pilot. You
can hear him grunting to combat the G forces as he pulls up to 9G (all
the way around a 360 turn). You can also hear him sigh in relief as he
plants the thing on the ground after his workout. (It's the airshow
where the MiG29 does a lawn-dart.)
Pulling G like that is work. Doing it for three missions a day is hard
work. Doing it without a G-suit is bloody hard work!
Walt BJ