I can't say that I am a light sleeper, during 2005 there was a raid on the base that I was working, 300 meters from my Hooch, 240B's, M-4's, AT-4's, and the wonderful M-2 .50cal going off for over 30 minutes, not to mention Kiowa gunships, and Apache attack helos overhead. The mortars were landing on the other side of base, AK-47 rounds were flying, I slept thru the whole thing, apparently I had heard something, because I had pulled my body armor over my chest while I was asleep.