...Now you can get blown up like a balloon too! Saw this posted on Nasioc, interesting concept but I'd think a fairly limited application: http://www.waspknife.com/index.php
Not me hot carl...white castle provides grade A methane. Or maybe some beans? mmmm. So would this thing be used for like sharks and whatnot?
interesting idea. could make for a good bear protection device for hiking/camping trips... if it werent $350