This reminds me of when my son informed me that we were going to go skydiving together. He said I couldn't refuse if he paid for it.

After I explained to him that it would mean my death, he backed off. I see no reason to ever jump out of a perfectly good airplane.

I saw the late Steve Erwin pass out while in the passenger seat of a US Air Force jet. He went on a flight while filming his show in the USA. He included the video of him passing out in the episode.

BTW, the ejected man, sans helmet, landed safely in a field

Very exhilarating! But once is enough...
And my kin all said the same about the perfectly good airplane.

but that's the kind of thing I would cover in the preflight briefing.

It all happened because his seatbelt/harness was not properly tightened and adjusted.

or whoever was supposed to strap him in.

When I take somebody up flying with me, I have to give them what is essentially the same briefing you get when you're on an airliner. This is how to fasten the belt, etc. It's in the FARs (the federal regulations)
I give a briefing on how to bail out and the use of the parachute as well. (I'll say "bail out" three times. The third one might be a little faint, because I'll be on my way out.)
Whatever you do, don't touch "this." Or "that."
Do you understand what I've just said? We can go over it again if you have questions.
I will make sure you're properly belted in. (It's on the pre-takeoff checklist.)

You're always messing up!

The pilot also should have been ejected. His seat malfunctioned so he was able to stay in the plane and land it! If he had been ejected, too, who knows where the jet would have crashed?

He’s probably very glad to be quarantined somewhere in France now.