You're stuck at the stoplight on eastbound Arsenal Street at Jamieson Avenue. All of a sudden your car and everything in it starts bouncing up and down. We mean really shaking. Your mind races: "It's an earthquake! The bridge is going to collapse! Oh, God, no! I DON'T WANT TO DIE!" And then, as quickly as the stirring began, it stops. That is, until the next vehicle turning right onto Jamieson passes by you, and the bobbing begins anew. It's then that you realize it's not a tremor. It's just the bridge swaying and buckling under the weight of the traffic. Phew! What a relief. But then you ask yourself: "Wait! Why is the bridge jiggling like Jell-O? Is that normal!? OH, GOD, I DON'T WANT TO DIE!!!"