Pick a group of caterpillars (yuck! I know – Just imagine it, don’t really go caterpillar-picking) and place them side by side on the ground. The caterpillars being an active lot, will start crawling in random directions, at times approaching each other and at times going away from each other, hitting a stone and rebounding, defying all laws of Chaos.
Now take an aerial view of the people walking outside the office mumbling into their mobiles, and check their trajectory.

See something common between these two?