A car wreck victim is rushed into the ER with a shard of glass lodged in her chest. A young man arrives with a bullet in his leg. Another man has a nail piercing his arm.
These kinds of incidents happen every day in emergency rooms across the country. The skin is the body's largest organ, so it's a pretty big target for flying objects and those that are deliberately placed, shot or inserted. And once an item has penetrated the skin, it can make its way to other organs, like the brain or lungs.
Often, when an object gets lodged in a person's skin (or through the skin to another organ) it's because of a car accident or an attack by another person. For example, it's not uncommon for people to show up to an ER with knife blades stuck in their skin [source: Sobnach, et al]. And a Colorado boy actually had a BB successfully removed from his brain [source: CBS News].
Gruesome accidents on the job can also land someone in the emergency room. Nails shot out of nail guns are frequently removed from ER patients [source: Centers for Disease Control and Prevention].
A lot of people would prefer having an object stuck almost anywhere other than the next locations.