Not sure about the "car falls into the lake" scenario, but I know some women who carry these for fear of a crazed Uber driver who might lock them in the car.
You can just unlock the door and exit the car in that case-- there's no way to "lock someone in" unless you've modified the lock somehow. And if someone did that, they probably reinforced the glass too.
You can just unlock the door and exit the car in that case-- there's no way to "lock someone in" unless you've modified the lock somehow. And if someone did that, they probably reinforced the glass too.