This is probably one of the coolest error messages (aka 404 pages). It displays different songs in a 404 layout. All the songs are 4:04 minutes long
The text says:
We’re sorry, we can’t find the page you’re looking for. But what we can do is offer you this special mix of tunes with running time of exactly 4:04. Just click on the album covers, or one of the links below, and enjoy.
It pays to delight the user when he’s lost!