It was a scary scene Saturday not just for Air Force cornerback Reggie Rembert’s senior season, but his future as an Air Force officer when we was carted off the field with a neck injury. Air Force coach Troy Calhoun said Rembert will undergo further neurological tests and said he was a “long shot” to play Saturday. Rembert’s replacement stepped in and held his own against Northwestern State, but BYU is not Northwestern State and the Falcons chances of pulling off the upset decrease dramatically if Rembert, who was voted to the All-Mountain West preaseason team, isn’t in there. After…