Nothing is unbreakable.

There is this things called ninja rock, i try in many laminated and safety windows before it does break glass like paper. For laminated, just have to try few more stone and use knife to cut away.

https://www.youtube.com/watch?v=llu-ckEe5cQ (watch the 4:30 onward for commercial glass breakage. )

Anyone have safety glass, please give it a try.