Revealing mistake: When Sabrina kneels down to speak with the child, his haircut around the ear differs completely from the previous shot.
Revealing mistake: When the terrorists drop the dead body out the aircraft door, look closely at the aeroplane just beneath the door, you can see the reflection of the mat the stuntman lands on, as well as the spotters around it.
Revealing mistake: When Rane jumps out of the hospital window and crashes through the umbrella, table, and people, you can see him land on an air mattress. Even though it's camouflaged to match the ground, you see it deflate under his weight.
Answer: Planes can take off from smaller airports by power braking. They can hold in order to get within 50% of necessary take-off power.