A car smashes through a guardrail on a bridge, yet in the following scene there is no evidence of a break in the railing.
The kids find a stick-shift Mustang, but the girl who drives it keeps her right hand on the wheel, and her left hand out the window throughout the scene, including times when she would have to be shifting gears.
The brake pedal in Mustang is too big for manual shift car. Due to the clutch pedal brake one is smaller than pictured in movie. So the pedal scene was taken in automatic transmission car.
6m30s in, a guy is playing the guitar with two females (both wearing a yellow T-shirt) around him, while a camp instructor is dancing around. The camera cuts to show Alex, and then cuts back to the instructor. Only this time, the left female all of a sudden is wearing a jacket. About 20 seconds later, she's still next to the guy with the guitar, but the jacket is gone again.
When two of the kids are hiding under the stairs of the main lodge, the alien monster breaks one step while descending. The step collapses under the alien's weight onto the next step.
When the kids flee the scene a few moments later, the steps behind them are intact.
The opening scene shows the ISS spinning about its center of mass, and various damaged and detached parts also rotating about this same point. Without any physical connection to tether these parts to the whole, they would not continue to rotate; instead, they would continue on their own linear trajectory away from the ISS.
At various points, the movie shows distant explosions with the sound and light from these events reaching the viewer at the same time. Since the speed of sound is far slower than the speed of light, the sound should reach the viewer approximately 4.7 seconds per mile distant from the viewer after the visible explosions.
When Alex throws his Rubik's Cube at the alien, it lands, showing two sides area blue. A Rubik's Cube only has 1 blue side.
Alex says the reason the phones don't work is because the power is out, but landline phones work in power outages because they get power from backup batteries and generators from the phone company (however, this depends on the technical configuration of the phone and connection).
When Alex first meets Zhen, he greets her in Mandarin with the phrase "Duibuqi" while the English subtitles read "I offer greetings, my fair princess." "Duibuqi" can be used as a greeting, usually interpreted as "excuse me", " pardon me" or "sorry" but the phrase doesn't contain anything that could be interpreted as "fair princess" or any other compliment.
Earlier in the movie, an EMP knocks out all electronics and electric devices (such as cell phones). When the kids find the 1971 Mustang, one of them states that it is an older car which doesn't need electronics to run. However, when they start driving the car, they are shown turning the radio on and blasting the speakers.