
Back in March 2005, Apple introduced a new feature to its laptops line called the Sudden Motion Sensor (SMS) to protect hard drive with the data inside it. This feature utilizes an accelerometer to detect a sudden movement (such as falling or heavy bumping) and then quickly lock the hard drive’s head if such condition is present.
But the geeks see this feature from different point of view – fun. Few “unordinary” SMS-based applications came to life. One of the favorites is Smackbook Pro which function is to switch virtual desktop every time user “lightly smack” the side of laptop’s monitor.