Continuity mistake: When they are on the motorcycle near the end, he is first traveling with the flow of traffic that is stopped (west). When she gets on the bike with him and the baby, they keep going with the flow of traffic. Than the smaller asteroid enters the atmosphere, it is traveling in the same direction they are driving on the motorcycle. But when it passes the girl's family in the van, now the asteroid is traveling against the flow of traffic (east).twstr988
Factual error: The shock wave that hit Messiah when it detonated the nuclear bomb on the comet would not have existed in space. It may have been hit by debris, but that would have destroyed the craft.
Continuity mistake: When the boy takes the motorbike from the garage the mirrors are out of line. In the next shot before he rides out, the mirrors are all in line.