The "previous" guy is actually supposed to be yourself. We wanted to do spatial audio effects so that if you played in headphones, you'd hear footsteps, gun and etc., coming from behind so that the player could build that connection better.
Thanks for the feedback. We spent quite a bit of time on lighting but I can see how it still can be improved. And yeah, currently I think it's a second - maybe we can make it 0.75 for the better feel of disappearing.