Don't worry too much about it. Like DJ said, if you are focused on it (likely from fear ) you will probably remember. Then boom, it will hit you some time when you are comfortable.

I've fallen a couple of times, but never at a light or stop sign. I stopped in the middle of the road one night to talk to some other riders who were stopped. They watched in horror as I fell to my left side saying 'Oh no!' The other time, I was taking off from a stop on tour but at the last minute decided to wait for one more car to pass. With my bike fully loaded and a little heavier on the right side, I went down. I cursed myself for about ten minutes but nothing was hurt, of course.