Stuck in fullscreen? Ok, so I wanted to show my friend my video I was working on in blender. I go to the preview window and hit "fullscreen" (or something like that). So now I am stuck in this full screen mode. I have tried:


Shift+Space    
Ctrl+Down arrow
Ctrl+Up arrow
Shift+Z
F11


Nothing has worked. Here is my file.
I am supposed to hit Alt+F10