Kiai

Rule:
The 'roar' must be totally unintelligible.
(I guess at least in your language, but ideally in ANY language.)

It should be just a wild roar, without indicating / being perceived to be indicating any meaning. The meaning doesn't matter, the *presence* of a meaning is already a breach of the rule.

Bear that in mind; I see Kiai as a way of 'revving up' one's capacity. Not only in a psychological but also in physiological sense.

Imagine a good motor revving. You know a good roaring makes you feel accelerated and gives a lift to your spirit.

Find a Kiai that you feel good, and do it.

In the spirit of Kendo

"Be prepared."

Someone said this as an ending note of a keiko.

It's a nice thought but that's a scouts' motto, I thought.

I guess what he meant was to value precision and foresightedness, but it came out in slightly scout-y wordings.

His suggestion was not wrong but made me giggle inwardly.

Don't be a 45-degree fool

The "45 degree" is often taught as the standard angle for L/R alternate cuts during kiri-kaeshi, but very stupidly, without clarifying where the pivot should be positioned or where exactly the cuts should land as the result.

Depending on the position of the pivot, the "45 degree" method can be pretty dangerous (& incorrect).

This is the reason why some people bash their partner's head almost from side to side while kiri-kaeshi, bursting the blood vessels in their partner's eyeballs, causing blood-shot eyes and mild concussion.

This isn't OK. This is dangerous and stupid.

As above, a valid 'Ippon' by L/R Men cuts are only awarded for the strikes no lower than the top-strings on a Men.

There's no such cut as "bashing from the side" exists, so, don't do it during kiri-kaeshi. Where that came from?

Be reasonable, don't be a 45-degree fool.