Hiroshi's only indication this is a thing that is happening is a rustling noise... followed by a direct blow to the noggin, causing him to fall over and Spur to fly off his head. Takuro yelps and runs over, waving his claw in front of Hiroshi's face.

"i Am gUYbRUsh tHREEpWooD, aNd I wANt tO bE A pIRaTe."

...Okay, he'll be fine in a bit. Sure. Okay. Meanwhile, Takuro looks around for the source of that little bomb while Spur tries to regain his equilibrium.