There's a humorous pseudo-RFC which establishes HTTP Error 447 as "dropped in Pacific Ocean". Here's some PHP to implement it, if you'd like. Sends the right header, and even looks like a standard Apache 2 error page.
");
?>
Dropped in Ocean!
Dropped in Ocean!
The requested item was accidentally dropped in
the Pacific Ocean while being transmitted to your
computer, and cannot be displayed.
If you think this is a server error, please contact
the webmaster.