I particularly enjoyed this bit of the Python Requests documentation:
"If the remote server is very slow, you can tell Requests to wait forever for a response, by passing `None` as a timeout value and then retrieving a cup of coffee."
Presumably the latter via HTCPCP/1.0.
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And not only does MDN have documentation for HTTP 418 it also shows full browser support:
https://developer.mozilla.org/en-US/docs/Web/HTTP/Status/418
