Talented freshman running back Brennan Clay caught a swing pass, made a man miss, then was walloped and injured, delaying the game for several minutes.
Clay was mobilized and then taken off the field on a stretcher with what seemed to be a very serious injury at the time.
But there is some good news.
"Brennan is going for further tests, and everything so far has checked out well," said OU head coach Bob Stoops. "Actually, when he left the field he was responsive, and I asked him if his parents were here [which they weren't and] he said no.
So perhaps it was precautionary.
"He was moving everything," Stoops said. "But they have to be sure and when he left in the ambulance for further tests, he had a big smile on his face and was talking. They still had him strapped in there. They just want to make sure they're not missing anything."
In other injury news, left tackle Donald Stephenson was shaken up early in the contest but was able to walk off under his own power.
And right tackle Eric Mensik was injured in the third quarter but is all right as well.
Neither of those were serious.