On SW in the late 80's (when everyone got the song reference) - "there may be 50 ways to leave your lover, but there are only 4 ways off this airplane."

And also on SW, after a bumpy flight and an extremely bumpy landing (accompanied by rattles in the overhead, falling coffee pots in the galley, etc.) - "It's our pleasure to welcome you to Houston. Please stay seated while the pilot taxis what's left of the airplane to the gate."