If you walk behind Hopkinton High School after school, chances are you’ll find a gaggle of teenagers running, yelling, and tossing around a Frisbee. This is The Blitzkrieg.  Named for their battle cry as they charge down the field to victory, the Blitzkrieg is a group of Hopkinton High School students who share a common passion: Ultimate Frisbee.  Commonly referred to as "Ultimate," Ultimate Frisbee is a sort of soccer-football hybrid, part of the reason why so many enjoy playing it. The game is played with two teams and one disc. Players must try to score in this non-contact sport by moving …