If you have ever been interested in amateur science projects, the stuff comes up not infrequently. For example: It's a coolant for do it yourself bubble chamber experiments. You can freeze a lemon solid with it and shatter it like glass with a hammer. That kind of thing.
Like I said, I've heard of dry ice. My high school general science teacher froze a banana and used to hammer a nail into a board.
It's the dry ice bomb I'm talking about. Can anyone point me to a TV show or movie where a dry ice bomb was made or mentioned? What I'm saying is that this is not common knowledge and when something is not common knowledge, it is incumbent on the reporter to explain.