Re: 'You are in a queue'!
Web servers can give an HTTP error code of 502 if the server is overloaded. It can be because the servers CPU is exhausted or bandwidth or many things depending on the setup and infrastructure used.
They can customise the error page to say anything though, in a similar way to the custom 404 HTTP error pages for page not found. You probably saw a custom 502 error page which told you to retry or redirected you to a static version of the site which is easy on resources, compared to the usual site that builds the page based dynamically on each quick which is more CPU intensive.
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