When Billy is having a breakdown and throwing things in the pool, his father's shirt switches from having water stains to not from shot to shot.
In the opening sequence, we are looking at a man at a breakfast table talking to his wife who is making breakfast. It shows her grabbing the frying pan's handle filled with steaming scrambled eggs and using a spatula, turns them while they are cooking, although she does not wear a potholder or other cloth to pick up the hot pan.