In a car crash, there are many things that can lead to your injury. Drawing in the front seat? That pencil becomes a projectile. Listening to music? Your headphones could potentially pierce the eardrum. No matter what you do, there's always a risk that you could be hurt.
One of the things people don't talk about enough is airbag safety. Most assume the airbag is there for their health, so they don't consider the harm it could do. When you're not the weight or height an airbag is designed for, there is a much higher risk that you're going to get hurt if it deploys. In vehicles today, there are more than just the airbags in the front seat. There are airbags along the sides and sometimes even in the rear. These all have great force when they deploy. It's hoped that the force is less than the force an impact would cause, but it's still a hazard.