Corrected entry: The damage caused to the house and garden when the jet crashed isn't anywhere near sufficient. The house is wooden, and the force of the explosion would have blown the house to pieces.
Corrected entry: In the scene where Christopher Walken comes up in the elevator for the first time, he breaks through the floor of "Moms" quite easily. Earlier in the film, the builders discover the "septic tank" (which is the entrance to the shelter) they comment about laying the cement slab right over the top. If there had been cement over the top, wouldn't it have been a little harder for the elevator to get through and wouldn't there have been rubble, rather than the clean break he made?
Corrected entry: When the plane crashes into the house, the elevator shaft is filled with rubble and debris, yet, years later, after the automatic timer opens the door to the same elevator, the shaft is only dusty with no wreckage.
Corrected entry: In the scene of Adam selling his baseball cards, we first see a shot of classic baseball cards from various years in his cigar box. Then in the next shot the shopkeeper holds the cards up to inspect them and we see the backs of the cards all have a uniform white background. These are obviously props.