See the video: http://www.youtube.com/watch?feature=player_embedded&v=q...
Just in case you ever have to turn off someone's Windows 8 computer - best memorize this ...
"In the Metro interface, hover your mouse over the Zoom icon that appears in the lower right corner of the screen. The Charms bar should then pop up displaying several icons. Moving your mouse up the screen will reveal the names of each icon, including Search, Share, Start, Devices, and Settings. Click the Settings icon and then the Power Icon. You should see three options: Sleep, Restart, and Shut down. Clicking Shut down will close Windows 8 and turn off your PC."
Yep, Microsoft buried the shutdown option in the settings menu!
When you see one of these at your local retailer, for a laugh ask the sales clerk to shut it off.