To get real about acceleration top fuel is fast, but nothing like the the Air Force. The took it to the next level back in 1954.
https://vimeo.com/292235615
This is where the development of seat-belts really evolved.
December 10, 1954, John Paul Stapp, facing forward, was accelerated to a speed of
632 mph, breaking the land speed record and making him "the fastest man on earth." The sled was then slowed by water, and Stapp took 46.2 g for 1.1 seconds.
These tests were what NASA used to figure out if astronauts would survive.