1. Crashproof knife: with repeated wounds against the wall, the knife remains of the same quality as it was.
2. Blowing at eyes: when ALT is clamped and the head is turned, if a character hits something at that time (in my case it’s a knife), the blow comes at a glance and not at the place where the blow should pass.
3. Many objects (like a bed, bedside table, table, etc.) do not have a collision to strike a knife. At a knife at blow about these objects simply there are no effects of blow and a sound. One of these items is listed in the video. ---------------------------------------------------------------------------

Video to all the bugs.