I did a video of a bug when unlocking my iPhone 5s with iOS 8, seems when there is one of those blue balls next to an app that has been updated it does a weird blue thing. See the video to see what I mean...
https://www.youtube.com/watch?v=5L1VWTk0vro
https://www.youtube.com/watch?v=5L1VWTk0vro