There was an odd one which seemed to be in a sort of "S" shape, almost like the plane had done a 90 degree turn shortly followed by another to get back on course
Also I noticed a plane flying in a huge circle at around 8:30, and he was still at it at around 11:00.... It was taking him about 15 mins to do a loop. I have no idea how fast he was going, but if it was say 240mph, the loop would have had a circumference of 60 miles. Wonder what he was up to? You can see the plane at around 9 o'clock position in the photo