During maneuvers in a foreign land, I had to drop a deuce.
I found an area with raised domes of earth. Atop one, I had a 360 view. Tactical choice.
I dig my requisite hole, and squeeze out some business.
I later ask one of the locals what the domes were. I am informed they were communal burial grounds.
The nightmares came hard and fast, and I didn't go the rest of the time I was in country.