[Hayato notices the staring, and smiles proudly before leaning over to show Ryuutaro what he's doing]

I'm working on my self-propelling dynamite. I came up with an idea while the manor was gone, usually they just change direction once, but I figured if I modified them right I could actually get them to make a 180 degree turn. Would give me the advantage in situations where my opponent is hiding around a corner.