Near the beginning of the film, in the sequence of the hat floating on the water, there is a small amount of water in the hat in a close-up shot (to see the owner's initials), but there is no water in the hat in longer shots.
When the henchman is talking to the out-of-town hit men, he gives Pop's address as beginning with a "6" before the scene cuts away. In the next scene, the address of the building is "165".