When we do the above tecnique, uke holds a loaded bi-bi gun with plastic bi-bi's. Tory wears correct eye protection. If you get stung by the bi-bi then you know the outcome. If uke at anytime feels like your trying to take the gun of him heel shoot. It is a safe way to practice, and its fun. On one session, a visiting sensei brought a replicle semi automatice bi-bi gun, it was fun adapting the tecnique.