If you break plate glass use the tool at the top of the glass with the handle above the head, otherwise the glass shards will slide down the handle and give you a nasty laceration(s) on the fingures and hand/arm.
I'm trying to imagine doing this. The top of my window is over my head, and it's a non-opening plate glass with some sun-blocking film. I have a Biehl tool, so I hit the window at the top, but I hold the tool so that the handle is above the head? I'm not sure I'm going to be able to get a good enough swing to break through. Am I confused on the directions?
I assume I hit at the top of the window to minimize the cascade of broken glass? And I just keep working my way down till the glass is gone all the way down, while minimizing the amount that falls on me?