It's called MacSaber.
"MacSaber uses your Mac's sudden motion sensor to detect movements, fast and slow. As you move your laptop, MacSaber plays varying levels of Light Saber sound effects, from a waving sound to exciting saber crashes.
MacSaber 1.1 includes support for backlit keyboards. Various amounts of force create brighter flashes of the backlight."
Try it! It's hilarious.
you can find it here:
http://www.macupdate.com/info.php/id/21732
"MacSaber uses your Mac's sudden motion sensor to detect movements, fast and slow. As you move your laptop, MacSaber plays varying levels of Light Saber sound effects, from a waving sound to exciting saber crashes.
MacSaber 1.1 includes support for backlit keyboards. Various amounts of force create brighter flashes of the backlight."
Try it! It's hilarious.
you can find it here:
http://www.macupdate.com/info.php/id/21732