and of course there's the old one of the frightfully well-spoken BA Stewardess who, on her last flight, delivered the Safety Briefing in a cut-glass British accent, ending with...
".....and when you hear the Captain call 'brace, brace, brace', you must put your head between your legs and kiss your arse goodbye."
And the Saudia Captain, also on his last flight with them, whether or not he meant it to be, who announced as he touched down in Riyadh,
"Welcome to the 13th Century",
And the Captain on a daytime LHR - JFK service who announced, 2 hours into the flight;
"This is your Captain speaking. If you look out to the right side of the aircraft you will see the sun, while if you look to the left it's not there. If you think this is unusual on a westbound flight, you are right, because we are returning to London due to a technical issue, and expect it will take as long to get back as it took to get here."