Factual error: The sisters run out of fuel for the helicopter, which is then shown slamming down on the ground and essentially destroying itself. All helicopters are capable of autorotating safely to the ground in the event the engine(s) quit. Of course, that would not have been as dramatic. (01:05:15)
Suggested correction: You may have noticed the helicopter was severely damaged, it may not have any rotating capabilities left after the fuel was gone.
I did notice it, but it did not look that any damage would prevent it from autorotation.
Perhaps the sisters (not being experienced helicopter pilots) couldn't use the autorotation properly.
OK, while that may be a possibility, if they have a helicopter pilot's license they would have had to demonstrate autorotation as part of both the curriculum and the practical exam. But listen, it's just a movie. The way they did it makes it more dramatic.