I was looking at some videos on Youtube showing hidden throws and takedowns hidden in karate katas. I have yet to see these application experts show me a practical technique out their so called practical interpretations. First of all, no one is going to punch at you like they demonstrate, things are not going to line up so you can move at the angles they tell you to. Yes, old school karate guys used sweeps and throws. These techniques came from other influences like judo. They didn't learn them through the break down of kata moves. Throws and takedowns don't work that we way.