Child Car Seats With Roller Coaster Style Pull Down Harness — (Idea 110 of 365)

My children, who are old enough to buckle themselves into car seats, always seem to take forever to strap in. Then I worry they did not strap in need tight enough. Why not develop a car seat with the same bar harness mechanism that keeps people securily in their seats on roller coasters? If it keeps people from flying out of a roller coaster going upside down at 90 MPH, then it should work for your car.