Walk This Way

So you push the big yellow or silver button for the walk signal. Nothing. You push again, and then you push a few times quickly, and all of a sudden, there's the countdown on the cross signal, 3-2-1, and walk. Was that a coincidence? Well, probably: http://www.kcet.org/updaily/socal_focus/commentary/where-we-are/what-you-need-to-know-about-pushing-the-walk-button.html