For one thing, Beatty had the breathing all wrong, he was bound to pass out. Junior is used to high G loads, besides he laughed his way all the way through the flight. Betty was trying some heavy breathing at first, don't work, you gotta take short deep breaths and force them down like you staining to poo.
I have never sustained high G loads for long periods of time in a high-performance jet, but I had a friend who owned a Stolp; man that was one good roller-coaster for short G loads like tigisfat speaks of.
Caz