I had a really close call on I 75 near Dalton Georgia. GSPwas standing outside of his car shooting laser, Psl was 70. Think I was doing a little over 80 in wife's 535I. As soon as I got the laser alert I tapped the brakes, may have helped. He was actually standing up and seemed to be targeting at random. It really got my attention. He was in a spot where I would expect radar and not lidar. The encounter was a perfect situation to utilize jamming, which would have given enough time to get to Psl. He was about 500 Ft. Away. I'm sure it was going to be a busy day for him.