There’s an ink pin made to star and break a window for use in a situation of trying to exit a vehicle. My problem with any options is keeping cool, thinking this needs to be done, and doing it. In the river, in the fire, under fire, it is a life threatening event. It’s not what most people including me think about a lot. Risk assessment and reactions under stress require quick thought. Not easy. Now apply those thoughts with the NYFD and all their training. Think they looked at the towers and thought they were going home at end of shift? Things happen fast, got to try to be prepared. Sometimes you win, sometimes you don’t.
Another poster on this thread showed a car window breaker and seat belt cutter. I saw that on the Weather Channel (not a fan or a devotee of their lying climate change propaganda BS). So You Think You’d Survive show.
Should really buy one.