As the name states, during a ground-fault (when the current going out is significantly different than the current going in) the GCFI interupts the current. Usually by a switch of some sort. (Pushing the "test" button produces that click, and cuts off the current)
These advanced camera shots, or angles, are used in film to convey an effect or emotion rather than exemplify a sense of space. Before filming, cinematographers will write out their shot list in order to plan how each scene of their film should be shot
It's a malware, and it basically let's the person/hacker/culprit get information off your computer without the owner of the computer knowing that the person is doing it. It's often used to find keystrokes, passwords, online interaction, and other personal data.
