Photo finishes at Rio Olympics

Even 0.001s can make a difference on the track, or in the pool. Missteps by pre-race favorites or disqualifications of players can also help athletes win medals. Let's check out some of the incredible victories at this year's Olympics and relive the beauty of uncertainty of sports.

Shaunae Miller of Bahamas dives over the finish line to win gold. [Photo/Agencies]

Shaunae Miller: Desperate dive

Shaunae Miller of Bahamas launched herself over the finishing line with a desperate dive to pip American Allyson Felix to Olympic 400 meters gold by the slimmest of margins in a thrilling final on August 16.

After literally flying across the line in a personal best time of 49.44 seconds, the 22-year-old lay on the track, shaken up and exhausted, as she waited for the scoreboard to confirm she had clinched her first major title.

"I didn't see anyone until the last 20 meters and the only thing I was thinking was that I must get that gold medal," said Miller.

"I think (the dive) was just a reaction, my mind went blank, the next thing I knew I was lying on the ground. I've got a few cuts and bruises but I'm OK."