And some operating systems are much more literary in their messages. BEOS has a web browser called NetPositive (which I suppose might be available separately) which provides normal error messages but each one is accompanied with a haiku (Japanese three-part poem normally with 17 syllables.) And there are multiple haiku (see I remembered the plural) for the same situation.
For example, for "Site not Found" you might get:

The website you seek
is beyond our perception
But others await.

or

With searching comes loss
and the presence of absence
The site is not found.

or

You step in the stream,
But the water has moved on
The site is not here.


Rod