[mlindner]

> Having watched a burly firefighter take three good swings with an axe to bust out a window (to get to the hood release of an unattended car fire), I am extremely skeptical of this claim.

Wrong window. You're talking about the windshield which is a completely different type of glass than other windows.

[mauvehaus]

He was trying to break the side window. Tempered glass is super tough, until you damage the outer layer. Presumably the pick end of his fire axe wasn't sharp or hard enough to scratch that outer layer without a hell of a swing behind it.