Thank you for those considered views chaps.With a few pints under your belt, that sort of rationalisation makes perfect sense.
I've remembered another point that left me saying: "You stupid women!," even as they were still doing it. When the two women were attempting to run away from the crashed 'alien' spacecraft, rather than run at an 90 degree angle from it, they ran with it. Maybe it was the Director's point to show the boys and girls in the cinema, just how fit these actresses are. It also showed how gullible the Director suspects we are.
Often in film, you can accept a certain 'suspension of disbelief', allowing that "It's only a film," but surely they should have had a 'show-of-hands' on set, and asked how many would, if "A car was chasing them", for example, would continue to run directly in front of it, rather than go to one side.