“Guy attacks with a firebending style move, Korra defends with an...”
That is not airbending or fire style movement
Ok, I’m going to cave and be smug for a minute just because I don’t have a whole fighting forms category of tags for nothing.
The phrasing actually used was
Let’s get to your second point first. it’s a little bit of a blink and you’ll miss it moment, but I was specifically referring to airbending, which Korra does here to cushion the rock being being thrown at her:
As for your first assertion, look at the earthbender’s movements:
Firebenders are more likely to use to use quick agile movements and fast punches like the first earthbending punch that guy does.
These same tactics also get used by pro-benders because using quick, agile movements is useful in the ring, and Bolin does it a lot: