Most of the time when I come to a red light and stop, it changes, and I am off and rolling. This time I was mentally drifting a bit and missed the change--after a few seconds the truck behind me tapped his horn, and I started to move forward. Just as I did, a car ran the red light on the cross traffic.
It didnt seem like much but then I realized that if I had been quick off the mark he could very well have got me broadside. I would have been about where he was at the same time since my left hand view was blocked by an SUV, and I had no way of knowing there was a car running the light.
Maybe from now on i will instigate the three second green light rule and if the hotshot behind me is that impatient he can pound sand.