Street Crossing in Singapore

The two armies were amassed on either side of the battle field. Their uniforms were inconsistent from person to person and the two sides looked as if they were a single people. It seemed that the only thing that separated them was a short distance. I wondered what they were thinking, standing in anticipation with weapons in their hands waiting for the signal. Finally, after what felt like an eternity the signal came and both armies marched into the playing field staring at the opponents. The advancing lines were ragged - some broke forward quickly and some seemed to hesitate. Finally the two armies met at the middle and to my surprise there was no clash, no wailing of pain. The two armies managed to pass right through each other without injury. The reached the other side of the field were their opponents had been standing a moment before and suddenly they were transformed back into tourists and shoppers going about their own personal business and moving down the sidewalk in random fashion. That is, until the joined another army standing at the edge of the street waiting for the green walk signal to begin the charge again.