Get inside your characters head
First-person perspective
Seen from the viewpoint of the player avatar. So in a car one would sit in the driver seat and in a character the view would be from the eyes.
Quake: https://www.youtube.com/watch?v=P8QcFd3x-g8
BF4: https://www.youtube.com/watch?v=Rgwf-Xu-FoE