I've noticed that too, Koilibear (although not the bit about shares).
"It flies because it has wings, not because it has an engine."
"You mean it only has one engine?"
"Yes. How many engines does you car have?"
I shut them up about the parachute by saying "Here, strap this on, and if I shout 'For fugg's sake, jump out!' then for fugg's sake jump out" (OK, I give them a proper briefing really).