It's rare (but does happen) in some versions, non-existent in others.
Usually when the screen goes blank, it's already in the process of rebooting, so initiating another reboot at this time usually doesn't do anything (because it hasn't booted enough to recognize the thumbwheels), or it starts the boot process all over again (meaning you are without a screen for that much longer).
Just give it a minute or so to boot on its own. If several minutes go by, then maybe it's time to pull over and see if you can take more drastic actions to get your screen working again. But in my experience, this has never been necessary.