Kicking a knife-holding hand
  Following my article " Dealing with knife attacks ", I want to make an admission:   I once thought that it was a good idea to kick knives out of people's hands.  Now I didn't actually teach  this: I don't think I have ever held a class  where we practised this as a "technique".   But I did use this scenario in a couple of demonstrations many years ago.  Why?  I suppose that at the time I thought it created a bit of atmosphere.  Bring out a knife and the audience perks up.   I also suppose I had in the back of my mind that it might  work tolerably well:  I'd seen it demonstrated so many times over decades of training that it was just "part of the furniture": kicking a knife-holding hand seemed quite plausible.  Of course, you'd never do it with a bare foot - but then again, when are we bare foot?  On the beach?  Generally we wear shoes in daily life.  And I suppose a part of me thought: "Yeah -  thick rubber and leather are going ...