Man, it's so tough to be a defender.
CD Lamb for OU makes a reception, does this half hop and drops to his butt, Texas player is half a step late (and I would argue unintentionally) does helmet to helmet. Texas player (correctly) gets ejected.
Next play Lamb does the same half hop, Texas player pulls up and tries to tag him; instead Lamb spins and races 51 yards for a touchdown.