Partial distortion on photo I took anyu idea what happened here?

[praningorwhat]

I took this photo with my 4g iphone and instantly the image on the lupper left grey area that looks like it;s been distorted in blocks. any aidea what happened here? and can I view the original image that wsas altered? and how? thanks

 

[Harvey Specter]

Water droplet on top of camera lens?