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PHOENIX - It's not often that the National Football League (NFL) sees a 29-year-old rookie.

But the things that set Arizona Cardinals wide receiver Robert Gill apart don't stop there. Gill is wowing social media sites around the globe with a clip that shows him jumping on a treadmill that is spinning at 25 miles per hour... and keeping up.

Gill kicked around in various arena leagues and the Canadian Football League before catching on with the Cardinals in a tryout. One scout timed him at 4.19 seconds in the 40 yard dash, a time that is viewed with skepticism, but the video clip leaves little doubt... this guy is blazing.