The moment we witnessed just how fast Katie Ledecky really is

It wasn't even close. 
Katie Ledecky set a world record during the 800-meter freestyle, clocking in at 8:12.86. It was her last swim in Rio and her other wins this week make her the first woman since 1968 to get gold in the 200-meter, 400-meter and 800-meter races during one Olympic bout.
SEE ALSO: Simone Biles doesn't want you to call her 'the next Usain Bolt or Michael Phelps'During the entire race, Ledecky was far ahead of her competitors, and she knew it. She beat the other competitors