Some very fancy high-speed vehicles have gullwing type doors.
In the event that one of these has an accident in which they overturn, today’s invention has the capacity to limit the damage to the occupants.
As such a vehicle begins to flip, the opposite door is explosively opened to provide a way to gradually absorb the energy of what would otherwise be a roof-on-tarmac impact.
The door could be engineered so that it acted like a very responsive spring system, limiting the rotational acceleration to less than that which would cause injuries.
A further system refinement might allow a robust door to flip the vehicle back onto its wheels.