One other thing. If you got hit, if you are wounded, it would be better to white out. Im a FR-Mountainbiker and I got myself injured a lot of times. My personal impression of a real heavy injury with massive pain is rather whitnening out like a flash instead of this DOOM or Wolfenstein Redout. They say its like seeing stars but I think its rather like a flash blinding you with pulsating gain of vision, and if its really heavy you get a tunneling view.
So it would be better that he screen is white for a second and pulsating slowly at a 5 second interval into a whitish blur while the edges of the view getting closer until blacking out, if heavily wounded an losing consciousness or dying. The immediate death blackout (Well I'm not to experianced about that

) would alos be better with a Whiteout and a quick blackout movement, except you are hit right in your stem-brain. Then its ok like it is now.