What does it prevent? At most it makes you fall in the water in the correct orientation.

At the price of your passenger seats being occupied by gas tanks, that surely are safe in a collision that's far more likely occurrence.

It's PR stunt, nothing more.

I used to wonder about the possibility of using thrusters to decelerate for impending crashes. I think for a substantial fraction of accidents that would be enough to massively reduce the risk.. but hopping over is an option I hadn’t considered practical.

I’d rather have an eject seat if I was so worried of falling off bridges lol

the purpose is: look at me everyone look at me

As opposed to just exploding from the high pressure tanks of gas onboard due to an otherwise survivable fender bender?