Oh yes, this. Went back up north to visit the family, mom tried to wake me up and *wham*, I just startled and punched without even being awake. I had already warned all my family about this, and to wake me up verbally or by turning on the lights (I think Marines always wake up when the light are turned on, boot camp training!) but she forgot/ignored this (hard to tell with her) and got whomped. Fortunately (?) she's a bit fat so it was more surprise than hurt, since I got her in the belly. Anyway at least she was not angry about it, but it sure was embarrassing!

I have some friends who were in Kosovo, they have the same problem. So it doesn't seem to matter where you were in combat, or when, just that you were.