So many improbable occurences in this film. From shutting off noisy machines that would attrack the creatures while covering the noise of your escape, ducking between things so that a blind creature cannot see you. Electricity still working in subway train, but no where else. Dozens of candles already burning in an empty church.
An apparently terminal person with cancer runs around unhinded, and then suddenly cannot move without pain relief patches. And the most chilled cat in existence, barely reacting to anything.
And still no explanation of where they are from, what they are and how an apparently mindless killer can construct interplanetary spaceships.