Any day that I learn about something totally awesome that I had no idea existed, I call it a good day.  Today, I am grateful for Parkour and for happening upon it.  Officially, “Parkour is the art of moving through your environment using only your body and the surroundings to propel yourself.”  In practice, it is like watching superheros fly through the air.  Real life protaganists escaping from the invisible enemy.  It is sweet.  If you got some time to watch  videos, be prepared to be totally impressed. (It gets good around minute 2:00, if your pressed for time.)