I was just about to post that idea.
I though about while playing with the new MARPAT Marines, Someone gets shot (dead in CWC terms) in a certain time period a medic could come over and revive him (ala DFBHD), if no one does come they die. Once a chopper, humvee, truck etc come to pick up everyone, the dead should be dragged/carried back to the vehicle and extracted with everyone else