... he said his teacher had said that in the next lesson he was going to teach them to breath through their toes - he decided it was time to move on.
Sure! As I said: It's the soles! Not the toes.
Nobody can breath through their toes! How should that be possible???
... through the toes ... some are really mad ... or charlatans ...
I would have left that teacher too.
hehehe somewhere in a video Endo sensei talks about how to be, talks about breathing through one's heels, want's to show ... suddenly halts everything! ... "Ahem ... not that there are really any respitory organs in our feet!" And looks around interrogativly as if he wanted to say "Everybody knows that?"