By Ryan AberStaff writerraber@oklahoman.comFORT WORTH, Texas — As soon as OU’s Gabe Brkic’s kick sailed wide two weeks ago to send the Red River Showdown to a fourth overtime, Austin Seibert had a sick feeling in his stomach.Seibert knows exactly what Brkic was going through.In 2018, Seibert had the opportunity he’d been dreaming about for years.Army had just put together what could’ve been a soul-crushing drive — eating up more than 10 minutes of precious fourth-quarter time with the game tied before Kenneth Mann’s interception gave the Sooners hope to avoid overtime.Read more on NewsOK.com