This was weird. I hit Ctrl-Alt-F2 to get a vterm, got a login prompt, logged in as root, was about to type something when the screen goes absolutely black. Ctrl-Alt-F3 - still black, Ctrl-Alt-F1, still black.
It was like using a vterm crashed the nvidia driver or something (I am using the rpmfusion nvidia driver, not nouveau because nouveau kept freezing up on me).
Anyone else ever seen this happen?
I was able to ssh in from my phone and reboot there :-).