So I have a question to all of you taking part in this discussion so far - if you were partnered with Doshu, or Shioda sensei for that matter (if it was possible), and they made a mistake in their technique - would you take the fall? Or would you point it out (by not falling when you didn't need to)? let's assume it's just practice, not a demo, so it's not that public.
I wish I could say I would... but I probably wouldn't. Unless they did it repeatedly often enough that I'd get pissed off... which is not really an answer I'm happy with either.