This is the form the sand begins to take.
Gaara does not control it.
I use facts duder, just like you did.
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Fighter2011: I understand that when Gaara's sand rushed out of the Gourd it kinda looks like he's gonna attack and maybe he was gonna. But it's quite clear that Gaara's sand is blocking the Amaterasu when Sasuke tries to land it on him. I thought that was quite clear.
Gaara's sand doesn't rush Sasuke, Sasuke's eye preps & bleeds to use Amaterasu. That is attacking my friend.