I received a web link from a brother about the "disappearing" car door. This new modification can be found on coupe cars only. It's a new technology coming out in the way of car doors opening and closing. I wondered about the strength and durability of the design as well as how we would get in to get people out.

I contacted the company and they e-mailed me back with this response:
The response to our product is overwhelming.
Thank you for your interest in our Disappearing-Car-Door!
Access and Escape for Passengers after an Accident.

Jatech has developed a Proprietary Access/Escape System which is built into every Disappearing Door vehicle. An Impact Sensor releases all latches after a short built-in time lapse to allow for secondary impacts. The door can then be pushed out wards to the ground as there are no hinges to hold front end of the door in place. According to a study involving Paramedics, Firemen and other accident responding personnel, access to passengers is much improved in any severe accident situation.

Power Failure Operation

The vehicles are equipped with Manual Override for Power Failure operation.

Underwater Escapes

A standard door cannot be opened underwater due to the pressure exerted by the water on outside of the door and therefore escape can only be achieved through the window. The Disappearing Door can be operated normally if the power operation is still functioning or if this is not the case, the manual method of opening will allow a relatively easy escape.

The first vehicles we are converting to our door technology are
High-end 2-door coupes.
If you have a Coupe that you feel Fits this specification please respond and we will give you an
Estimate of the cost.

We will be be adding other types of Vehicles beginning in 2009
We will keep you appraised of our progress.

Keep watching our site for further information and vehicles.
We will also put you on our mailing list.

Again, thank you for your inquiry And we look forward to contacting you.
Regards,
You can see the video on their web site http://www.disappearing-car-door.com