I think everyone experienced this at around 16:17(EST), perhaps is server maintenance or maybe a temporal failure on the server.
I have experienced similar situations in the past which are linked with server maintenance, I'm not really sure if that was the case but I think it affected everyone.
Yes, the server crashed during some maintenance. Sorry for the inconvenience!
As noted by Coxis, you can check GTPlanet.org for site infrastructure status updates. I will always try to note technical events there as I'm made aware of them.