When Saul visits a startled Walter at the classroom, the latter drops a pen. The first time we see the pen on the floor, it lies next to the right leg of Walter's chair. In the next shot, it suddenly lies next to the left leg.
In the opening scene, when Badger and the cop are sitting on the Better Call Saul bench, some spooky things happen in the background. Specifically, a man and woman couple walk back and forth, but once they walk to the left twice in a row, and once they mysteriously appear from behind the pillar; and a man with a dog and a bicyclist disappear behind the pillar but never reappear. Also, there are a few cuts when a person walks directly in front of the camera.