Making the totally wrong mistake

Today when we did the run I did the totally wrong thing and feel really horrible for doing it I know I let my teacher down for making this choice. Our teacher said to us to do the run he also said to run as far as we could, And most of us including me took that as a message to run half way, So we turned back. we got told to do the full run under fifteen minutes so I tried but I did not beat fifteen minutes but If that was the timed run I would have got a better time. And I don,t know why getting yelled at pushed me to get a better time, cause basically every time we do the timed run I don,t run as hard as I know I could. I really need to make up for this mistake by pushing myself out of my comfort zone and smashing my time. As I write this blog post I think back to that mistake and think, why did I do it.