There was another one when they were kicking to the right (I think the 2nd quarter) where there was a blatant throw by Guelfi on the wing, followed by probably a HTB against Cotch. Guess which one Richo spoke about.
The Aarts one was a nailed on HTB and should have been given but it didn't hurt them.
The Grimes one by the letter of the law was not a free kick as he attempted to dispose of it without any prior. Mentioned this in the game day thread too, an example of the media not even knowing the rules. He didn't drop the ball, he dropped it towards his kick but the tackle forced him to miss the ball with the kick. Now maybe we all think that that type of thing should be HTB but by the letter of the law it was not.
I can see why Aarts wasn't pinged. The umpire was behind him his left arm moved in a motion to try and handball and the ball spilled forwards. Umpire wouldn't have known whether he he did or didn't make contact and would have guessed I personally would rather them not guess, would only make them more inconsistent. Grimes lifted his arms above the tackle and didn't legally dispose of the ball. I am not sure where the umpire was at the time I can only assume that the umpire thought it hit his foot and/or was blindside or had his view blocked.