I've watched the replay of Mag's injury several times in slow motion.. To me it looked like Mag ran out to try to draw a charge or block the lane on a driving Kobe Bufkin who was essentially unguarded at the time, (probably due to extra attention being given to Dickinson by RU defenders and other split second cover switches related to that), but Mag was still moving forward toward Bufkin at the time of the collision with his arms raised over his head trying to draw a charge, resulting in a blocking foul. Either Bufkin's head or his elbow hit Mag in the face as he drove into Mag. He ran directly into the front of Mag's body, but Mag wasn't stationary yet. Mag seems to be fearless when it comes to attempting to draw a charge. It's how he got injured initially at Prolific Prep too.