@tinker@infosec.exchange so, when I encountered one of these test objects at home sitting on a counter, my first thought was that it resembled this really old-fashioned toy that I know about: a plastic boat with a little chamber that you put baking soda and citric acid (or whatever) into and then close it down so there's just a little stream of bubbles coming out the back of the boat, and it'll move through the water that way, farting out bubbles of carbon dioxide to impel itself