The first two scenes in the video below I posted yesterday so you can skip those. At about the five minute mark you can see the Weyland/Engineer encounter in full.
Lastly we have an extended cut of Shaw's confrontation with the Engineer. This takes place right after, in my opinion, the worst scene in the entire movie. What's that? Oh, when Janek rams the Engineer's ship and it comes hurtling back down to the surface. Now that isn't what makes it so bad. No, what makes it so bad is that Vickers (Charlize Theron) and Shaw (Noomi Rapace) see that the damaged spaceship is barreling down on them, yet they continue to run in a straight line. Say what? Yup, it's unbelievably stupid. Of course at the very last second Shaw luckily trips, falling to the ground, realizes how much of a moron she has been, and simply rolls to the side to avoid the oncoming debris. However, Vickers I guess is supposed to be having a blonde moment, and she just keep running straight until she becomes road kill.
Anyways, back to the extended scene below. In the theatrical cut Shaw races back to Vickers' module since she is running out of air. She gets there, sees the tentacle alien is still locked in the medical room, and then picks up an axe for protection. David soon alerts that the Engineer is headed her way, and a few seconds later it does. No build up. There isn't even much of a struggle as Shaw quickly opens the door to let her alien offspring out so it can kick the Engineer's ass.
The extended cut below is much better in my opinion as it actually creates tension and it kind of helps explain how Shaw is able to be so feisty after recently giving birth to an octopus. Check it out.
Skip to the five minute mark
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, is directed by Ridley Scott and stars: Charlize Theron, Idris Elba, Logan Marshall-Green, Noomi Rapace, Guy Pearce, and Michael Fassbender. The film will be available on Blu-Ray and DVD October 9th.