Sports cinema is scattered with tales of peripeteia (a reversal of fortune), such as the classic 1993 underdog film “Rudy,” the 2003 soccer flick “Bend It Like Beckham,” or really any of the “Rocky” movies. Studies have shown that humans are psychologically attuned to root for the underdog, and this might explain why we are so thrilled when the perceived weaker party experiences peripeteia, whether by winning the big game or learning an important life lesson from Mr. Miyagi.