Hmmmm....
If all you're worried about it people jumping out of buildings and not dying (I'm not sure how that's handled in the Realism Mods) than you should re-focus your views. This game has bigger realism issues to deal with, and what you pointed out is just one of them (a small one at that).
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=[SE]= MSgt. Parchy
Screamin' Eagles
Company First Sgt.
http://mohaaplatoon.tripod.com