I've seen many passengers in cars, light trucks or SUV's - almost always women in my experience - put their feet up on top of the dashboard, lean back in their seats, and drive along like that. I've always regarded it as extremely dangerous, because in the event of an accident, they won't be able to stop their bodies from sliding forward, underneath their seatbelt. Also, the airbags may slam their feet and legs into other parts of the vehicle, inflicting injury.
A recent accident in England produced this horrifying X-ray.
Metro UK reports:
Police have released a picture showing the devastating injuries a young woman suffered when she was in a crash.
The victim, who has not been named, had her hips crushed because her feet were on the dashboard and not in the footwell.
One of her hips was broken while the other was dislocated.
The image was shared by sergeant Ian Price who said: ‘Here is an X-ray of horrific injuries sustained to the front seat passenger who had their feet on the dashboard at the time of a collision.
‘If you see your passenger doing it, stop driving and show them this.’
. . .
[A] local fire brigade added: ”Airbags deploy between 100 & 220 MPH. If you ride with your feet on the dash and you’re involved in an accident, the airbag may send your knees through your eye sockets.’
There's more at the link.
I'm going to show that picture to Miss D., and have a heart-to-heart chat with her about potential injury, pain and suffering. I want her around for many years, preferably in one piece!