A few years ago, a 738 had a fan disk disintegrate. (It was contained, IIRC.)
The PA from the FO went something like this. "Ladies and gentlemen, unfortunately we've experienced a catastrophic failure of the right engine, and need to return to (departure point)...."
Spoken with later, none of the passengers remembered anything that was said after the words "catastrophic failure".
Technically spot on, though.
