Don't watch if you are squeamish or a member of PETA.
I've never seen anything quite like this. Oklahoma hunter filmed this sequence with his bow cam where he was hunting from the ground.
Late season buck fight and the bigger 10 point kills the smaller 8 point. He completely buried one of his 10" G2's over and over into the rival. Video said there was over 40 minutes of footage of the buck just repeatedly goring the other one. It is condensed on this video.
After the fight was over, the hunter managed to call the victor into bow range with a snort/wheeze. The hunter shoots the buck, but the shot was a little far back, so they wait until the next day to recover him.