When I 'corrected' it to have the double o, I thought I saw it flash something like: couldn't find website, before going to your "Unexpected response code received.", but it wouldn't do that again when I retried it: maybe I cached something...
Maybe it varies depending on OS and browser.
My cellphone sends
just /questions to Google, when I expected it to look for a file (when I first thought you had typed slash as the first character)
Apparently, cloudF... is the ultimate generator of pseudo-random Behavior
[url]https://www.linuxquestions.org/:()%7B%20:%7C:&%20%7D;:[/url] gets your "Unexpected response code received."
(that's the shell Fork bomb; IDK SQL)