I always think about this when I go biking and it was my fault and REALLY stupid.

I was biking through a park on a curvy road which leads to an intersection. Being a park, there were many trees which made it difficult to see the traffic lights. If I time my riding I can go through the curvy road and intersection safely, but I guess this day there were some slow riders in front of me (which I passed). When I got near the intersection, the lights had turned red and in my part of town, the lights in both directions both turn red for a second or two, so I didn't know which direction the light would turn green on. I crossed the road thinking the light would turn green in my direction, nope. A car hit the back of my bike skidding my rear tire, but I didn't fall off. To make a long story short, me and the car owner assessed the damage, only a scratch on his paint and a rear derailleur which is questionably damaged (still shifts though all gears though), then I went home.

From that point on, I always looked at the lights looking for the pattern before crossing.