Sam would have had her head shaved prior to her brain surgery.
Elvira Parker's padlock to her gate is facing the incorrect way.
When Paul tells his mom he is picking up the broken glass, his hands are holding the glass. In the next shot, his hands are not holding the glass.
When Samantha lifts the bully up, the wires holding him up can very faintly be seen.
When Elvira shoots BB the final time a cable is clearly visible attached to BB's undercarriage used to flip the robot backwards.
The furnace is ablaze, and the Pringle home almost burns down. Black smoke, rivaling a steam locomotive, billows out of the chimney, enough to cloud the sky. It s broad daylight, yet nobody noticed.