I have seen the footage. I have seen numerous stills. None of which show what Horwill's brain is doing at the time. Like I said in my original post, it's pretty clear that Horwill got him in or about the head. No doubt. I simply take exception to claims that he deliberately intended to strike the head. All the footage in the world won't prove that.
Regardless of what Horwill was thinking, it looks positively terrible.
If this had been picked up at the time by the referee/assistants and reviewed by the TMO, I have little doubt he would have been given a red card.
If the Brumbies had complained post match, I think Horwill would be facing a lengthy stint on the sidelines. I'm pretty sure this would be viewed as being in the upper end of rucking.