The two in-state rivals aren't very fond of each other, and it even shows in the game notes. Check out this table Oklahoma put in for this week's game.
I believe those would be shots fired. Which, considering Pistol Pete has more than one gun, might not be the safest thing for Oklahoma to do. Of course, when you've been the better team historically and you've won 9 of the last 10 meetings, it's hard not to get a bit cocky.