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. However, known implementations do exist. An Nginx HTTP server uses this code to simulate goto-like behaviour in its configuration.“ — wikipedia

418 / code reference(s)
Rails HTTP Status Symbol
:"i'm_a_teapot" (explanation gist.github.com)
← return