The other thing to remember, and this is BIG:
Exceeding wound or strain threshold means being TAKEN OUT.
Not killed. As in - not dead.
Get stomped on by a bunch of StormTroopers, and guess what? You wake up in a scary place. The story goes on...
Another thing to mention, is that hitting zero doesn't cut it. You have to exceed the threshold, so you don't drop till -1.
Count for the bad guys too.