That Fourth Door

So waaaay back when I was building E1M3, I discovered I needed a fourth locked door for the design to work. Thankfully, Doom supports three regular keys and three skull keys, so I just used the blue skull key space. Being the paragon of maturity that I am, I decided it would be funny to add a reference to the "error 502: bad gateway" problem that plagued fimfiction.net at the time. 

As time went on, I found that three doors really sufficed for pretty much everything else I needed, so this door only appeared sporadically past that level (only one other's really coming to mind right now, and it's a secret level so it doesn't count).

Obviously, it's been a while since E1M3, and fimfiction.net has improved as a site, so much so that this error message has become nothing but a distant memory. I supposed I could change it to a green or orange keyspell or something like that, but at this point, it's been there so long it's basically an intrinsic part of the game now. 

And then today fimfiction.net went down and it's still down as of this writing. So I feel a tiny bit vindicated by that. 

...I think.