This was in the 2nd half, as we were making our comeback. Gourgi wasn't under the basket. He was out near half court. He would turn his back when Montrezl shot FT's. I have to think its some sort of superstition, which I wholeheartedly endorse. I have never noticed this being done when any other player shoots FT's.
maybe someone who DVR'd the game can review this and confirm. the camera angle was taken from under the basket.