Alright.
First make theese three marcos:
/console CameraBobbing 1
/console CameraBobbingFrequency 0.01
/console CameraBobbingSmoothSpeed 0.0028
/console CameraBobbingLRAmplitude 0
/console CameraBobbingUDAmplitude 10000
Macro 2 (this will change horizontal value of camera)
/console CameraBobbing 1
/console CameraBobbingFrequency 0.01
/console CameraBobbingSmoothSpeed 0.0028
/console CameraBobbingLRAmplitude 9000
/console CameraBobbingUDAmplitude 3000
Macro 3 (this will reset camera to normal)
/console cameraBobbingSmoothSpeed 50
/console cameraBobbingLRAmplitude 0
/console cameraBobbingUDAmplitude 0
Now join any BG, such as Warsong gulch.
When inside, activate headbobing.
Zoom in into First person mode.
Now click eighter Macro 1 or Macro 2 and run forward while pressing them.
The camera will now go through everything! Including mountains, walls, and even invisible walls.
This makes it possible to "see" the other team's players and could also be useful in AB to report where their team is heading.