https://www.msn.com/en-us/news/technology/astronaut-quits-halfway-through-training-1st-in-50-years/ar-BBMz9BZ?ocid=spartanntp
Seems interesting…
Last occurrence, 1968 by John Llewellyn
Llewellyn "needed to learn how to fly jets and couldn't fly with cockpit blacked out." Wiki