Break a chopstick with a piece of paper
Two full glasses of water are placed on adjacent tables. A piece of bamboo is placed on top of them, the bamboo is of length so that it reaches between the near rims but not the far rims. Tori breaks the bamboo in two with a sword cut, without spilling the water.
Breaking stone on stomach. Tori lays flat, with eye protection. Stone is placed on four points: two rib points and two hip points. Head is raised slightly, but not tilted forward. Tori kiais to push up stomach, pushing up stone. Kiai must be timed to coincide with the downward stroke of the hammer, which Uke strikes the center of the stone with. Tori's intent must be to break the rock on the hammer.