The Sightjacker is a program used to catch aimbotters. The program sets the camera to the "first person view" of another player. This means that you can see how another player is aiming! So you can see when the person you are sigthjacking suddenly snaps to the head of another player. This snapping is caused by the aimbot of course.

SightJacker for PC (uses numpad)

SightJacker for Laptops (uses F1..F5 keys)