Nothing, not even bright light, will hard reboot my One?
I was moving a ROM zip from one folder to another in Root Explorer, and switched to the play store while it did that and updated my apps. When I switched back the phone became extremely slow, and then froze. I pressed power once to see if that worked, didn't. Now the screen is off and all it will do is flash the hardware keys. Held an LED flashlight up to the light sensor. Nothing. Held it up to an LED light bulb. Nothing, even held the volume down key while holding power. Nothing happened. It just froze out of the blue. Running ViperROM (but not the incremental updates, every time I opened GooManager it said no updates found even after saying it found them). No custom kernel. Not S-Off'd.
Edit: It came back, sorry.