I love reading shit like this. HTTP status codes, official and less so:
418 I’m a teapot (RFC 2324)
This code was defined in 1998 as one of the traditional IETF April Fools’ jokes, in RFC 2324, Hyper Text Coffee Pot Control Protocol, and is not expected to be implemented by actual HTTP servers. The RFC specifies this code should be returned by teapots requested to brew coffee.
420 Enhance Your Calm
Returned by version 1 of the Twitter Search and Trends API when the client is being rate limited.
451 Unavailable For Legal Reasons
A server operator has received a legal demand to deny access to a resource or to a set of resources that includes the requested resource.The code 451 was chosen as a reference to the novel Fahrenheit 451.