I can barely bring myself to read stories like this now. I never really thought about it before my son was born, but there's always this dread you live with in the back of your mind. This little helpless person has your life in it's hands. The world and fate is trying to take them out, and if they succeed you'd never recover. You can learn to live with pain, but I don't believe you ever get over something like that.
Kids are unpredictable. I remember being 7 years old and waiting with my mom to cross a busy street. For some reason that today is unknown to me, I decided to just run across the street as soon as the lights turned yellow. I almost got hit and my mom almost had a heart attack. I use this example to keep me alert when I'm with my daughter in a potentially dangerous but seemingly safe environment. You never know what's going on in their little heads.