Before Nunn went down , Aaron Ross tackled him .
Before Nunn went down , Aaron Ross used his helmet to cause a fumble that was recovered by Texas safety Marcus Griffin at the Nebraska 44 - yard line with 2 : 17 left .
Before Nunn went down , Aaron Ross tackled him and used his helmet to cause a fumble that was recovered by Texas safety Marcus Griffin at the Nebraska 44 - yard line with 2 : 17 left .