Oh, and I found this...
https://www.businessinsider.com/elon...rplanes-2018-8
Why Musk stopped flying military jets:
..."But in addition to launching two of the world's most famous startups, Musk also devoted some cash to his love of aviation. He purchased a Piper Meridian single-engine turboprop, a two-engine Cessna Citation CJ2 corporate jet, and a high-speed military jet called the Aero Vodochody L-39 Albatros.
The L-39 jet was designed and built during the Cold War in Czechoslovakia, which was a satellite state of the Soviet Union.
...( article goes on to quote some of Musk's flight exploits in the L-39) ...
Despite the thrill of such flights, Musk eventually stopped flying L-39s.
"
I was like, man, this was made by some Soviet technician and maybe they tightened the bolt right, or maybe they didn't," Musk said, according to "The Space Barons" book. . It was like, 'This is crazy. I've got kids. I have to stop doing this.'"
