It sounds pretty bad. JimmyK: Update by JasonB - "he just fell down. Didn't see contact. Def favoring left leg/knee" Update by JasonB: "eagles say hyperextended knee, still evaluating, no news until tomorrow" Update by JasonB: "Kolb said he just visited with maclin and he was positive. Fwiw kolb says he didn't think it was anything serious." Do we have any doctors here for insight on hyperextended knees? Also, what does it mean when your left arm goes numb? It happened to me on Saturday when DeSean Jackson got hurt, and again with Maclin today. Is that bad?