I let my 13mo daughter play on the keyboard of the computer the other night. She loved it, and its interesting to see what happens. On Windows 8, start + down arrow will flip your screen apparently. Today, she was in Firefox and hit start + F9 which then made it impossible for me to type in the address bar of Firefox. Reset firefox, uninstall/reinstall, nada. Finally found this post which said the key combo to fix the problem.