So anyone considering adding a glass cutter or punch for train windows to their EDC ?
Nope. I already carry a short titanium prybar in my kit which I consider provides a superset of functionality and in a pinch, my flashlight or multitool could do in a pinch.
However, consider laminated glass may be involved. My guess is to smash and then cut it with a knife. I suspect this should work (assuming sturdy blade), but would probably be really hard on the knife.
Worse, plexiglass. Very problematic if mounted well. Hmm...
-john