I post this as a reminder that any teaching of how to fight or hurt another human being has to be done under moral and legal guidance.
It is of the most extreme, horrible and disturbing nature.
+18 and Viewers Discretion, please.
If any mod wants to delete it, fair.
But remember this when you teach or learn to fight. Good ol’ Karate Ni Sente Nashi and all that. Oss.