It was probably part of the stage and a bug moved the pixels or whatever.
Most of the games I've
hacked used flymode cheats on, sometimes do this to the world, random bugs, not much to point out.
inFamous, is the best game ever and you can't say it isn't cause it would a lie!!! SO THERE!
Sam: "This goes down to fiery bowls of America's filthiest city."
Max: "You've been listening to my inner bathroom narration again!"