20 MM, a 30MM from an A10 would have caused a lot more damage.
Here is an update to the picture.
Update: According to an Air Force news release, investigators determined that this mishap was due to pilot error. "The cause of the accident was the failure of the pilot to positively identify the intended target during the nighttime, close air support training sortie," the news release said. The F-16 pilot had been wearing night-vision goggles while firing the jet's 20 millimeter canon. He briefly lost sight of the target area as rolled and began the strafing run, then misidentified the SUV as the target, which was actually 1.5 miles away. The two soldiers in the SUV were part of a different training project on the range.
Paladin0