Perimeter defense...

Or lack there of. I just watched Roy Williams drop his head toward the floor following a 3-pointer by Tyrese Rice. It looked like Marcus Ginyard got confused because Ty Lawson came up the court near Rice, then crossed to cover another man. Ginyard was late getting over and didn't really even get a hand in Rice's face. I'm pretty sure it was Boston College's fifth of the game, which would account for 15 of their 17 points.