A UVa engineering freshman has been arrested and charged with “creating a hoax explosive device” after he stuck some dry ice in a water bottle. Clearly, I should turn myself in. I, too, created precisely the same hoax explosive device on Friday afternoon, when I put several ounces of dry ice in a discarded apple juice bottle for the same reason. In my defense, it was really awesome. (I took a couple of pictures, one of fog spreading across the floor and one of my dog freaking out.) Can somebody tell me why is this kid being charged with doing something that his engineering professor may well have recommended?