I was directed here from Sci-Fi SE to pose this question.
Towards the end of the Aliens (1986) movie, Ripley is forced to override the clearly marked "outer door" control having already opened the inner one with the resultant decompression and loose items being pulled out, etc. This was to hopefully expelexpel the Alien trapped under the machinery.
How realistic really is this effect? Would the instant decompression force not pull her clean out (without being physically fixed down, locking arms does not to me seem sufficient but I may be wrong) and it seemed to take a relatively long time to evacuate the air in the ship too, from memory it was still being exhausted when she closed the inner door again.