This often happens when I'm biking - I'm going the same way as a car, and for whatever reason we'll hit every single red light. The car will beat me to the light, but we both end up sitting there waiting for it together.
Today, this happened, for several miles -- this car with two dudes in it and I, just zipping down West Street together. Over and over again. Every light, we'd end up next to each to each other, awkwardly waiting to race again to the next light.
On their last light before turning, I pulled up next to them and the guy in the passenger seat rolled down his window, grinned, and gave me a high five. Then they turned left, and I kept heading north.