Leonel Manzano
U.S. runner Leonel Manzano confused many viewers and even a few commentators with the ritual he performed just before his 1500m semifinal. Waiting at the start line, Manzano licked his fingers and then touched his forehead, throat, heart, arms, knees and feet. Nobody knows for sure but internet chatter suggests he was stimulating acupuncture points. Judge for yourself with this video clip or just watch Manzano compete in the final on Tuesday.

Manzano licks his fingers and touches his throat as part of his pre-race ritual. Think that's weird? Wait until you see the video clip.

Jillian Camarena-Williams
U.S. Women's Shot Put champ Camarena-Williams explains her distinctive hair accessory: "My Grandma always wanted me to be known as the thrower who had something that she always wore. So she said, 'You should wear a yellow ribbon'. She passed away about two years ago and ever since then, every competition, it's in my hair." (Photo by Alexander Hassenstein/Getty Images)

Sanya Richards-Ross
Richards-Ross reveals that wearing a lucky charm is part of her pre-race ritual - "I always put my bullet necklace on. My mom gave it to me when I was in the 7th grade." It was certainly working for her at the Olympic stadium on Sunday when she displayed some bullet speed to win the Women's 400m final. (Photo by Nick Laham/Getty Images)

McKayla Maroney
Maroney's Olympic journey has wavered from the glory of sticking a near-perfect vault at the team final to the grief of falling during her individual vault performance. But before both of those vaults, Maroney executed her usual routine: she steps on the runway and slides back on her left foot, as if loading a spring, before starting her run. (Photo by Ezra Shaw/Getty Images)

Serena Williams
Four-time Olympic gold medalist Serena Williams has multiple superstitions she sticks with before every match. Her quirks include bringing her shower sandals to the court, tying her shoelaces in a specific way and bouncing the ball five times before her first serve and twice before her second. (Photo by Clive Brunskill/Getty Images)

Usain Bolt
The fastest man in the world celebrates winning the Men's 100m Final by unleashing his signature victory pose. (Photo by Pascal Le Segretain/Getty Images)

Michael Phelps
Michael Phelps performs his famous three arm swings on the starting block as part of his pre-race ritual. (Photo by Jamie Squire/Getty Images)

April Ross and Jennifer Kessy
U.S. beach volleyball duo April Ross and Jennifer Kessy have a habit of hugging after almost every point they win. We hope they'll hug enough times to get them onto the medal podium in London. (Photo by Ryan Pierse/Getty Images)