College football rivalry week was turned up a notch this year thanks to an outbreak of attempted flag plantings. It's not exactly a new trend, as former Oklahoma QB Baker Mayfield can attest to. He may have been one of the first that people remember doing the act when he did so at Ohio State in 2017.

Of course, it all started with former Oklahoma Sooners quarterback Baker Mayfield, the original flag-planter. Mayfield famously planted the OU flag midfield after the Sooners went on the road and defeated Ohio State in 2017. The eventual Heisman Trophy winner had a performance (and celebration) for the ages that night in Columbus.

Security is deploying pepper spray to quell brawling players after rivalry games.