First player shoots from penalty spot on goalie. Goalie blocks/doesn't and then runs to the back of the line. First player runs to take goalie's spot. If first player missed shot and allows goal, they are out. If they made goal and allow goal, they are in. If they missed goal but block shot, they are in. They then run to back of line and repeat. Player must miss shot and allow goal to be out. This continues until a champion is crowned. Shooter has to wait until goalie is facing them to avoid getting a ball to the face, but should otherwise move very quickly...it is called lightning after all. 

Every player needs a ball