You only have a slight concussion because of the airbag, but otherwise, you are perfectly fine.
Smith crashed into the side of the restaurant, but he was able to get out of his car without a problem. Because of the seatbelt, he did not suffer as much as he could have.
Due to the airbag, Smith had a slight concussion, but his seatbelt kept him back when inertia was trying to move him forward, which would have resulted in a bigger injury. This shows Newton's first law of motion.
From this point on, Smith was a safe driver and he always remembered to wear his seatbelt.