When you’re at the top, there’s nowhere to go but down. That’s the bitter inevitability that East Mississippi Community College (EMCC) hopes to forestall for as long as it can. At the beginning of the six-part documentary Last Chance U (Netflix), which premiered last Friday (July 29), the EMCC Lions start the academic year undefeated for nearly three years, with a streak of 24 consecutive victories. (The junior-college record is 27 wins.) Led by their screaming barrel of a head coach, Buddy Stephens, the Lions fully intend to win their fourth national championship since 2011. Then the inevitable happens.