Weapons of war...? Did he mean the Blue Rose? Rin feels the need to open his big mouth.

"Hey, we're not planning on waging any war! We-- MMPHH!"

Shima, thankfully, claps his hand over Rin's muzzle to keep him from saying anything else. Rin struggles and thrashes his tail. "MMMPH MMGH MMM!"

Also, come on Lambert; he DEFINITELY looks like someone who would stage dramatic fake drownings. Look at him.