[CW: Injury] Colonel John Stapp was his own test dummy. Endures 43g deceleration.
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https://www.youtube.com/watch?si=dI4HZk04r5hhFBwF&v=6fuERphIlJk&feature=youtu.be
https://youtu.be/6fuERphIlJk?si=dI4HZk04r5hhFBwF
Back in the day, you had to be willing to do it yourself.