In a nutshell, probably! My guess (and it would be just that, and probably wrong) would be that Apache (or whichever webserver-software PF's server uses to serve the site) went a little bit "crazy" and needed a bit of a kick...

I'm sure Stu or Pet will be along to say what actually happened, though, the above may be completely wrong as it was just a guess based on the fact the server itself was still there, but serving no web-pages...