If someone asked me, "Hey, what should we make a tank out of?" I can't say that "bubbles" would be the first thing on my mind. I'd probably start with "steel" or maybe "titanium," because it sounds cool. If I wanted to get creative I might say "recycled plastic" or "aged mahogany." But bubbles? Naw, wouldn't even occur to me. It's occurred to someone, though, because Bubble Tanks puts you in control of a tank made of bubbles. Your enemies are also bubbles, which is handy. I don't think this thing is going to be running the Axis out of Antwerp anytime soon.
Bubble Tanks [Armor Games]