It is not very realistic, that the CJ even at low health, still runs and jumps as whether everything is in order. Now when your HP is very low (10-20), a "Heavy breathing", bleeding, worsening sight and hearing, light swinging screen (as close to the reality of the characteristics), and you can't jump and run.
If you stop, you will have a bit of hurt holding the wound.
If the health of critical (1-5) you start to slowly die: partial loss of consciousness, time floats slowly, you have the opportunity to make a couple of shots, and then begins a slow, but "epic" death.
And as with any death added time dilation.

This consist 2 version.Man and Woman version and for installion just read file readme
and if you have question.you can ask me