Greg Myron is playing the last football game of his career as the high school’s star running back. As the clock counts down the final seconds, Greg rushes 70 yards down field until he is tackled out of bounds. When the kicking team comes out to try for the winning field goal, Greg remains motionless on the ground. Students must differentiate between head trauma and fainting as they work their way through this interrupted case study, which is complicated by Greg’s medical history. Students use their knowledge of the control of blood pressure by the autonomic nervous system to determine what is wrong with Greg. This case was developed for use in a one-semester animal physiology course taken by sophomore and junior science majors; it could also be used in an anatomy and physiology course.