Run Poser
n: While a person is on a run, they will increase their speed to a, roughly, 95% sprint when in the sight of others. Once out of sight, they will slow down to the jogging or walking state that they were in before being noticed.
Earl - "Look at Jim go! He can really run."
Billy - "Don't be fooled, Earl. I hear Jim is a real run poser."
Billy - "Don't be fooled, Earl. I hear Jim is a real run poser."