While these extended versions of the original scene don't actually shed any more light on exactly why The Engineer decided to wipe out Weyland and his crew, they are still interesting additions. Maybe he the big fella just thought Weyland's God complex needed to be taken down a peg or two..
In the distant future, two superpowers control Earth and fight each other for all the solar system's natural resources. When one side dispatches a team to a distant planet to terraform it for human colonization, the team discovers an indigenous race of bio-mechanoid killers. Ridley Scott, director of 'Alien' and 'Blade Runner,' returns to the genre he helped define. With PROMETHEUS, he creates a groundbreaking mythology, in which a team of explorers discover a clue to the origins of mankind on Earth, leading them on a thrilling journey to the darkest corners of the universe. There, they must fight a terrifying battle to save the future of the human race.
Prometheus hits DVD and Blu-ray October 11th.