An often neglected detail in web design is creating a custom 404 page. As sites grow in complexity, designers–read site administrators and contributors–move posts and pages around and cause broken links. Even the most diligent webmaster will miss some of the redirect issues, which is why spending a couple of minutes creating a 404 Error page has so much value.
However, 404 pages don’t have to be boring, or merely functional. As the article below points out, custom error pages offer a unique opportunity to fly your brand’s freak flag. Look at my example here, then go check out other sites for inspiration.
Funny 404 pages are a great way to add a little character to your site. Here are 10 great examples of clever 404 pages.
Source: Funny 404 Pages – Examples and How to Create Your Own