Damien

That image looks bad but from the other angle it was clear his other foot wasn't extended and was tucked behind the leading leg. As he followed through that leg then came up but not into the player or the ball. Critically he went into the tackle with one leg. It's a yellow because he went in the way he did but his studs weren't going into the players shins/ankle, he led with a single leg and he won the ball. A red was too harsh.

People are taking 'two feet off the ground' too literally.