We have a lollipop at the end of our street (that's what we called it in Britain). It was just a small roundabout at the corner of a street. So, back when I was a child, I used to ride my bike around that area. It wasn't until one day when I rode close to the brick walls and skinned myself on my left hand. Needless to say, it hurts for weeks and the scar took months to properly heal.