The camera follows the jet, but also rotates toward a focal point some distance in front of the jet. This means that even when the jet inverts, the camera inverts, too. The previous camera script did not have this function. I would think individual players would have differing opinions as to whether or not they'd want the camera to invert, so I think I'll find a way to offer the option. I could see this and other settings existing as player preferences.
The speed of the camera's movement and rotation can be finely tuned, along with motion damping, to further suggest speed. When the player uses the boost mechanic, the jet zooms ahead and the camera has to catch-up. I also scripted a simple lighting change to occur when boosting.
This screenshot shows some great Unity post-processing effects like motion blur and volumetric fog.