thanks for spending the time to put the list of other threads together russs15, you have truly humbled my efforts to find out about this. i never imagined that so many people would have put together so many different versions...
i downloaded the mp3 of the mono mix but... i'm sure i remember the 'close the blast door' line being repeated twice, like the open one. does anyone else remember it this way? is my memory growing old and confused? i'll have to check on my old VHS next time i go and visit my parents. yes i do still have it, moth3r, but i don't have it with me.
unfortunately not long after recording it i lent it to a friend of mine (at the time) who saw fit to record an episode of the flintstones over the first twenty minutes. as a result of this i have a very uneven knowledge of the film and, quite probably, a unique version of it on tape.