I could give credence to your argument if I knew what the fuck shimming was the author indicated that Brian knew of the shimming. Just before SKM!Brian decided for no apparent reason to not want to kill Justin, there was no mention of the shimming only that he touched his hair, and that they screamed of pleasure, and of the rhythm of their trusting. THATS when he smiled of the first time! Not at the time of the shimming. Hell, he might not have even seen the shimming! We don't know what that water was like. Maybe when buck ass nekkid Justin came out of the water, his hair might not have still been shimming at all. After the initial reference, there is no further mention of the shimming. Just because the stars were shinning, it doesn't necessarily lead to shimming.