Raijin watched as silently as he did everything; which was to say, he only appeared to be loud, due to all of the colors on his body from his hair and clothing, as well as his inability to stay still without working on something. "Neh, not bad, really. Yer balance is off by some, and yer grip is over-tight. Migh' be why ya have so much trouble with grip switches. Try not holdin' it so hard, nah?"
The elder strutted over some, seeming to be off balance as he walked; yanking the branch from the other's hand and showing what he meant. "See, ya hold it waaaay to tight. Yer hand's gotta reset everytime ya let go, an' the lockin' joints screw yer grip. Ends up bouncin' outta yer hand, ya?" Hell, he was barely holding the branch as it was; but when he started swinging, it was like he was holding a perfectly balanced blade. Even as light as the branch was, there was no drag, no resistance from the lack of weight and mass against the drag of the air. Flip grips, hand switches; left, right, upside down like he'd be holding it by the blade; all without missing a mark.
"See? Too hard, an' ya screw yerself over. Buuuut..." The change was almost unseen, a slight relaxing of his right hand currently holding the stick; and when he launched into the next burst of movement, all control was gone. Hell, he clipped his own ear with the flaying end of the branch, leaving a spot of red that was slowing expanding as his blood slowly seeped from the small cut left behind. "Too loose, say g'bye ta all ya control. Ya gotta find ya balance, neh.~"
Flip the grip, fold his free arm behind his back, change to a fencer pose, stab straight out. One wrong move would have send the sharp point of a V-split right into Shiruku's left eye. Course, he knew he could stop; but he wanted to see just how fast the boy could dodge. He had no intention of hurting his student; not intentionally; but curiosity killed the cat, as they say. Dodge or not, Shiruku was safe, so long as Raijin didn't trip and fall.