The coach places balls along the sidelines. The idea of the game's speed is that when the ball goes over the sideline, the team continuing play can take the nearest ball from any edge and continue the game immediately. You can additionally use, for example, a three-second rule when starting from the sidelines (make a decision before the coach counts to three).
Quality factors
Observation, speed of decision-making, situation awareness
Key questions
What's the quickest solution? How do you ensure your teammates know who has the quickest solution (communication!)?