Lily, Hullinger

1. One of the first camera techniques that I'm going to name wasn't used until around the last half hour of the film. It was the use of light. The light had moved from a position of either shining up or onto the characters to shining down on them. The lights were brighter as well, no longer the dark blues and greys that had been in use before. This was used to show dawning realisation. The more the characters learned about the truth, the brighter the lights.
2. Then there is, of course, the exact opposite of that. The way that lighting colours were used in the beginning. In the beginning of the film, everything is dark. Dark blues, greys, and browns, all adding to the sense that you're supposed to be getting from the film itself.
3. When Colin Farrell's character is first really introduced, the shot including him and Tom Cruise is used to show the contrast between the two characters. The way that they are on opposite sides of the screen, slightly blocked by a third character makes the tension almost palpable.
4. Camera angles are also super important. Whether they be facing up, or looking down on the character, they convey a certain sense, show us what to feel, whether we are aware of it or not.
5. One thing I also thought was interesting was how the "man in the window" was done. Everyone sort of just assumed that there was another man involved in the whole Crow murder, but it was, in fact, just a billboard that the windows were blocking. That was neat.

The precogs are used in the film to predict murders before they can happen. They can see the event taking place up to several days before it will actually happen. They are used in the precrime division so that the officers can see what they see, and stop murder from happenig. Theoretically, precogs could eliminate the act of murder entirely.

The environment in which the precogs live is entirely sterile. Very few people are allowed in and out of their chamber. They remain mostly submerged in a bath of what I can only assume is full of chemicals, drugs, and anesthetic. They are completely secluded and never allowed to leave

From a purely medical perspective, this treatment is unethical because, while the environment is completely sterile, exposure to anyone could put them in serious danger. Agatha probably should have contracted a multitude of diseases when she was brought into the outside world. Plus it's extremely unethical from a purely moral perspective, but that's another matter entirely.