In The Avengers: Age of Ultron,
Ultron made a Sokovian city fly. He was going to turn it into as meteor and then knock it back against the Earth.
Later in the movie,
the S.H.I.E.L.D. Helicarrier came to rescue civilians. At that point, someone said, "approaching 35,000 feet".
the Helicarrier and the flying city were both at an equal altitude, why didn't Sokovian civilians suffer from the low atmospheric pressure and cold at 35,000 feet? They seemed healthy enough to make their way to the rescue pods. Also, they were healthily amazed after seeing the Helicarrier.
the force field which Ultron was using to maintain the integrity of the rock, it should be limited to the surface of the city or it wouldn't be difficult for Tony to blow out everything if he ever was able to land inside the force field. Also, Ultron had no intention of saving civilians. Is this a plot hole?