I was run over by a car when I was 2 years old. Yep, right over my chest. Collapsed lungs, but no broken bones (at that age you have lots of cartilage). As a result, I had a trachiotomy, which left me with a scar on my neck and two scars on my chest where they reinflated my lungs.
I have many scars on my head from childhood, one over my eye when I fell off a tank in the Marines, one on my hand where I was hit by an arrow (long story) and one on my leg (another mishap on a tank). A few others but that covers the majority of them.