Special Effects...

On sunday I was watching the film '300' again, and I loved the way they had mixed real footage with incredibly impressive special effects. I'm not sure how they did it but I really like the effect it had on the entire feel of the film. Everything is made to look very dark and moody, and it makes you feel very disconnected from the film but in a good way, because it makes you want to understand more about what is going on in the film. It intrigued me and I would love to know more about how the producers created that effect.
An editing technique that I noticed throughout the film was the use of slow motion in order to build up tension when something momentous is going to happen. For example, in this clip the main character is seen going towards his opponents at normal speed and just as he goes to kill them, the clip is slowed right down so that the audience is eagerly anticipating the kill. This is exaggerated even more for his final killing of the clip and the sound (both diegetic and non-diegetic) builds on the tension even more.
The use of high/low angle shots also came into the film a lot in order to establish the status of the characters. For example, in this second clip, the shots of the character Xerxes are all taken from slightly below him (character of Leonidas is seen to be looking up at him) in order to suggest his superiority.