https://www.popsci.com/blog-network/vintage-space/john-paul-stapp-real-life-rocket-sled-man/
John Paul Stapp, a Real Life Rocket (Sled) Man
John Paul Stapp subjected himself to more than 40 Gs -- that's 40 times the force of gravity -- in the name of pilot safety.
john paul stappreal liferocket sledman