 CONT: When Mike and Nancy are confronted by the giant spider at  Nancy and Genius house, Mike kills it by kicking loose a pipe and  when the basement is flooded he throws a broken light socket into  the water and electrocutes it. However, in later scenes, especially  the one where Fred and his gang break in to steal the goo, which  takes place a few minutes after Mike and Nancy leave, there is no  trace of either the flood or the burned carcass of the spider.