If a member of that team is able to cross over into the opponent's end zone, it's worth 2 points. If the person with the ball gets downed in his OWN end zone the defensive team receives two points. The game clock, which measures the actual 60 minutes worth of playing time stops at the following times. When a team takes a time out. The WR has to be a great athlete, a fast runner with catching and ballhandling skills.
Good WRs make a lot of yards after the catch by breaking the tackles of the cornerbacks.
The C is positioned in the middle of the offensive line.