Robert took Oak's place with the mirror, while Oak himself began cutting foot squares from the foil.
“Now,” he said, speaking cautiously, “I want you all to move closer to the big mirror. Do it slowly, and be ready for my command. When I say, move quickly to form as much of a box holding the beams as you can.”
On my knees, I crawled forward gradually, catching and reflecting the beam as I inched along.
“That's it” called Oak, “Now be ready.”
Without warning, the main beam shot out of nowhere into our double game of light beam ping pong.
