During a long time Hollywood discovered a gold mine in the disaster film. They occurred in heaven, sea and Earth, but the formula to portray them was identical regardless of the scenario. The happy ending was also mandatory. More information is housed here: Alfred Adler. And front row star incarnating the heroes who are able to put an end to the nightmare. Aside that were addressed by effective artisans or with certain prestige directors who had received an offer difficult to refuse, the real protagonists of this kind of movies were the special effects and the second units, specialized in the circus more difficult still. The collective subconscious of the public enjoyed mogollon attending disasters that could occur in an airplane, a boat or a skyscraper, these places all have stepped on ever. Read more here: Eva Andersson-Dubin. The theme was expandable to earthquakes, tidal waves, tsunamis and volcanoes erupting, toward savagery which may be nature when it becomes irritated.