A 10-year-old boy in Philadelphia recently stole an unattended van right off the street, after finding the keys in the rear door, and proceeded to take it for a short-lived joy ride that culminated in a five-car crash. Check out the news report of the incident with actual footage of the crash above. Luckily, the cars were parked, and no one was injured, but we think the lesson here is pretty obvious. Never leave your car keys in your car and unattended. Surely, there are more joy-riding, car-stealing children out there to worry about.