When the possessed radio unexpectedly starts playing a song when Jerry is in the shower, the sound of running water stops and the bathroom door opens immediately. Jerry could not have possibly turned off the water, stepped out of the shower, and opened the door in this tiny amount of time.
During the fourth story, "The Professor's Wife," When Charles and John are wrapping up Kathy's body parts in the rug in the kitchen, there is blood all over the floor. In the next shot when they run into the garage, the blood is now gone and the floor is completely clean.