Originally Posted by
tartare
That's a pilot!
He uses correct terminology - maintaining ninety one hundred.
He knows what squawk means and is able to switch codes to 7700.
He uses appropriate coms brevity.
Not too many pilots saying 10-4 on the radio where I live. ATC would tell you off for not using properly phraseology (unless you are in an actual emergency then anything goes).
I suspect he's a trained first responder. When I think about these rare but not unique events, the common thread seems to be that the passenger knew enough about how to use the radio that they could communicate with ATC, they then learn the rest of what they need to know as they go.