Sudden deceleration, like that experienced in a car crash, causes airbags to deploy. Sensors responsible for detecting this deceleration will trigger a chemical explosion that causes the airbag to inflate. Once the explosion is triggered, the actual deployment only takes about one-tenth of a second. After the driver’s (or passenger’s) head makes contact with the airbag, the air pocket begins to deflate. The speed at which this process occurs makes driver preparation impossible. The same speed and force that deploys to protect is also the most common source of airbag injuries.