Ok.. So these pictures were taken in Ireland. The first one is 'the ghost' - you can see a woman's face in the picture (top right). Immediately after taking the picture it was retaken because the first one had looked so blurry (the face wasn't noticed until later).
It wasn't foggy or misty that night and no one was smoking. It was cold though, so there's a chance it could be breath, but that just seems a bit of a stretch considering. No other pictures had anything like that in them.