^^ What he said. You're in S/W update mode, mostly referred to as download mode.
If the Volume Up button was pressed while it was plugged into a USB (usually a computer of some sort), then it enters download mode. If after a restart it doesn't boot normally, just flash the KDZ from the forums.
If THAT doesn't work, then I'd say hard reset after the KDZ flash (you shouldn't have to do that though.)
Best of luck(: