what is that?

[wulff]

You are cute Sara I would hang around you too if I were a ghost, LOL! Seriously, I wouldn't worry about it, a few years ago I was on a job in the midwest and a co-worker and I stopped at a bar for lunch and were the only customers there, the place was over 120 years old and the girl working behind the bar was at the farside and I stood up and said 'smile' and took a photo with my phone, there was a 'streak' so I immediately took another one and it was fine (no flash on phone). I showed it to my friend and he commented it looked like it was going into a picture on the wall...... I went over and looked at the picture and it was a photo of the front of the bar taken in the 1880's with a lot of people standing in front of the place! The swirl looked like the one in your photo except it was a lot larger and went smaller as it went to the wall! Very strange.
Also, my daughter went to a mall with some friends and they took a lot of pictures and in every one my daughter was in there was a large colored light so you couldn't even see her!! It was only on her but nobody else even though they took a lot of pictures!