This is the second time now this has happened. I press the button on the side to wake it up and unlock. Sometime the screen doesn't come on, or it comes on and the screen is unresponsive. Then it lags like I pressed the button 10 minutes ago. One time is actually got stuck between animations. For example, twitter came up half way so I could still see the background and apps behind it (half way through animation). It just hung there transparent in a small square. The only solution both times was a battery pull. I'm hoping it's an app or something. Anyone else have this issue?