you are in recovery, you need to go to bootloader, so either:
adb reboot bootloader
or if that doesn't work
Force reboot: press and hold POWER + VOLDOWN (under a bright light, not kidding!!), after about 5 seconds or so buttons should start blinking, and after 30 seconds or so, the phone will reboot, let go of POWER, but keep holding VOLDOWN to get back to bootloader.
(you may need to try 2 or 3 times to get it right)