Noah Lyles photo finish: See the image and learn how it won him the 100-meter dash

Think you saw Jamaican Kishane Thompson's arms cross the finish line first? It doesn't matter.

According to Olympic rules, a runner is considered to have finished a race when part of their body from the clavicle down crosses the finish line.

So on that so-close-you-couldn't-even-see-it finish between American Noah Lyles and Thompson in the 100-meter dash, it didn't matter if Thompson's arm was out front.

According to the judges, Lyles' body -- from the clavicle down -- crossed .005 seconds before Thompson.

And now Lyles is golden.

Here is the photo from Omega, the official timekeeper of the Olympics, that won Noah Lyles the gold medal and title of fastest man in the world.

You can see Lyles' torso just ahead of that of Jamaica's Kishane Thompson.