4 giant UFOs appears on a photo taken in Lavonia

On October 4, 2014, a man and his wife were in their car near city of Lavonia (Georgia). Woman took photos of landscapes. But, on the last image, they noticed four impressive UFO not visible at naked eyes…

Witness reports:

Wife & I driving on hwy I-85 westbound. Sky had multiple cloud formations. My wife held cell phone out window and was snapping shots as we rode. After about 7 shots she stopped. Nothing was viable in sky as we rode. After snapping pics we were looking at them. On the last photo we saw the 4 objects which looked like exhaust coming out of bottom. One or two previous shots showed faint blurred images which I assume we're part of this 4 but not as close. Never saw items, only appeared in photo. After seeing these my wife and I wondered how we had pics when nothing was visible. Other who have seen the pic are also wondering how this could be.