While we're on the subject of Alien I heard a great story about it on the commentary on one of my Dr Who DVDs.
When the film was premiered in London, Tom Baker (The current Doctor at the time) was invited along to it with a couple of the actors who were in the Dr Who episode they were currently filming at the time.
Apparently during the part of the movie where they're discussing going down into the bowels of the ship to kill the alien Baker shouts out at the top of his voice 'Why don't you all go down there and bore it to death.'
Quite a number of people gave him a round of applause.
