The officials probably wanted to get out of there - due to both the weather and the OSU fans.
Long story short: they were likely afraid for their lives and wanted to get out of a stadium that was likely 90% OSU fans.
I was at a Wisconsin-OSU game at the shoe about 15 years ago which OSU had won by 2TDs. My buddy and I headed for the parking lot early to try and beat traffic out, and we were outside when the game officially ended.
Less than a minute after the end of a game, the officials came speeding out in a special van to get away. Because the game had been a close one at the shoe, they had a protocol to escape as quickly as possible to avoid the fans’ wrath.
At the time we thought it was comical - but looking back, those refs were afraid for their lives. I imagine the bloodthirstiness has only gotten worse for the blue blood programs.