When me and another guy found signs of a person entering a cave during the invasion of Grenada, we yelled in English and Spanish to come out, but heard no response, so we tossed a grenade in there and left. (We didn't want to look and see because A) if there was a body, it would have been horrifyingly gory, and B) if we did kill some Cuban soldier, and we knew about it, then that would have entailed