QB scare: There was a moment of concern midway through practice when Matthew Stafford came up limping. He flexed his knee several times, but it proved to be no big deal. Stafford confirmed after practice that he and Ameer Abdullah had bumped knees. "Friendly fire,'" Stafford said. – Mike O’Hara
Good work: Lions head coach Jim Caldwell said after Friday’s practice that the last two days were invaluable in terms of evaluating his players, especially some of the young ones. Guys were put in uncomfortable situations against players they weren't used to and hadn't schemed against.