Wisconsin's Montee Ball is one of the best running backs in the nation. So it's no surprise that he can leap defenders who are attempting to tackle him.
Usually, he has no problem pulling off athletic feats like that. Usually.
On this particular play, Ball tries to jump an Oregon Duck player in the Rose Bowl and comes up just a little bit short. As you can see in the video, the Ducks' helmet drill Ball right in his namesake. No cup or padding is going to make this hit OK. It's a surprise Ball even stayed in the game after this.