Their 500 page - https://github.com/500.html - is better

Reminds me of the dreaded 'Pink fluffy unicorns dancing on rainbows' torture:

https://www.youtube.com/watch?v=Sm368W0OsHo

Personal favourite for novelty error pages is the Rolling Stones' 404 — http://www.rollingstones.com/adsf

I have seen this under normal conditions, during something like they were bringing it back up after scheduled downtime.

But...but...their 404 has parallax