It'd have to be a pretty big object, I think. Your reasoning alone is not enough for me to consider it not-weird. If there was evidence that there was a windstorm in the area at the time and/or that a big piece of sheet metal fell in some field, that would probably be enough to make it less-weird.

Edit: comments in the thread suggest it might be camera distortion, which seems more reasonable to me, but doesn't account for it appearing to go behind clouds.