Revealing mistake: When the boulder rolling down the hill hit the man, he "vanished" - he was not flung into the air and it did not look like he got run over by the boulder. [Poor/ineffective CGI]. (00:31:55)
Continuity mistake: The corner of the file folder (containing divorce papers) was touching the edge of the counter but extended past the edge and was closer to the side when Peter approached it. (00:09:25)
Continuity mistake: Before the family went outside, the fire extinguisher was part-way below the window sill. When Peter (father) went inside, the fire extinguisher was away from the window sill (more toward the right of the screen). (00:07:33 - 00:09:12)
Audio problem: There was no sound during the time the scientist was giving his several-word response to, "Do you want a coffee?" (00:16:25)