In the first episode, Sonja is "On the road with the air force". Like all prospective pilots, she has to undergo medical checks and tests: In the human centrifuge, the future jet pilots are tested for their resilience under acceleration (the so-called G-tolerance). The centrifuge can accelerate the occupant to 10G in just two seconds, i.e. ten times his or her weight is then bearing down on him or her.
