Why applications shake in iPhone?

Answer 1

If you press and hold down on an application, they will all shake. May of them will probably have an X in the corner, tapping the X will delete the app (with a warning first). If this makes you nervous, you can set a restriction on deleting apps in Settings. This will make the Xs not appear when the apps shake and the only way to get the Xs back and delete an app would be to go back into Settings and type in the PIN you set. Also when the apps shake, you can move apps by tapping and dragging the app around. Dragging the app to the side of the page will let you move the app to the next page. Placing an app at the row on the bottom of the screen will allow the app to follow you onto any page. Placing an app on top of another (in iOS 4 or later) will let you place the two apps in a folder that you are able to rename while the apps are shaking. Shaking the phone while the apps are shaking should shuffle your apps. And finally, to stop the apps from shaking, press the home button.