He hit the dashboard with the flat of his hand.

He braked, and my body hit the dashboard.

Rafiq's knees hit the dashboard.

I hit the dashboard.

Dick Dart, who had been lounging back in his seat, slipped forward and down until his knees hit the dashboard.

Charlotte's head had hit the dashboard, and after they watched her for a while, they were going to send her home with her father.

Without this air bag, the person would just keep moving forward (and not accelerating) until hitting the dashboard.