What was interesting was this concept of an unstoppable creature…bent on eating the population of the small towns. True to form, the highschoolers were trying to warn the authorities - but it was too late ! The monster noshed on increasing numbers of the PA populace, eventually making its way to a movie theater (which is in Phoenixville, PA), before the heroes can make their way across the street (in reality, 11 miles away) to hide in a diner before the Blob can be defeated (spoilers !). Bottomline, for this Cold War kid, the whole concept was a look at the spread of Communism. As the Blob absorbed more and more people - the redder it got.