When the Nationals' Gerardo Parra pinch-hit in the bottom of the sixth inning in Game 3 of the World Series on Friday night, nearly all 43,867 fans at Nationals Park stood up on their feet.

It was time for "Baby Shark." The phenomenon, making its World Series debut, began on June 19 when Parra decided to use the toddler tune as his walk-up music. "Baby Shark" became the rage at Nationals Park this summer, and the song continued to excite fans well into October.