when you went back to the lock screen was it still blury?
if no, minor "loading error" much like the lock screen not responding to touch sometimes.
if still doing it try a reboot. if that doesnt do it try a hard reset (pressing and holding for 5 sec the home and sleep/wake button)
still doing it? hook to computer and sync sometimes this repairs problems
ok it cant still be doing at this point right? well just incase it is back up and restore is a more drastic route.
When all else fails and your vision grows dim and no hope seems to be avalible...: take it to the apple store and let them repair/replace/brick it.