Ah yes, proper prebriefing of the passenger.....
Ex USAF radar operator bravely agreed to come with me in a 172 from Florida to Texas and back over Christmas.
The 172 was a rental, in less than perfect condition (what rental is ever in perfect condition???) We had a lot of trouble making his door stay latched before we even took off, therafter pretended it was a Piper and only had one door....
The second thing that went funny was on the westbound leg, from Florida to Baton Rouge, Louisiana, when on approach, with a 727 following, the flaps failed to deploy on very short final. So I remarked, as one does, Oh ****.
Never never never say Oh **** when a passenger can hear you. It spoils his enjoyment of the experience. I am sure you will all take this message to heart.
Happy New Year!