Why not? Half-Life Mod 2338 has it, ur model doesnt have legs off, and it just switches to a model with 1 leg, 1 arm etc...
and on ur hud with ur body... Say u got ur right arm shot with the laser 9mm, it would cut ur arm off, so your right arm would be shown on ur green body (in ur hud) and the right arm would be pure red to show injury.
You Lose aim, and your model is changed to one with no right arm... Easy as pie for experienced coders like the ESF team, I mean the 2338 2.5 version is only 2mb download!!!
Or something like that, u gotta admit a 2mb download with a far more advanced model situation than ESF, a 40mb download?
The coder who did this was a kid. And most of the ESF team have a experience coding/degree and are 20+!
Just my little bit!
Peace!
Kame-Haka