Hi painbrother,
in the first days of 2013, I would check the timestamp of the batteries on my machines. As you, I took the BG in one hand. On the LotR, suddenly the BG slip out of my fingers and crashes in the $$-invisible-Cabinetglass. It crumbling in some razersharp peaces (maybe it wasn´t savity glass). Because stern glue the translites to the BGs, the LotR-translite was further badly scratched by the fragmented BG and the $$-invisi-cabinetglasses became deep scratches too. Luckly for me, the CG don´t broke. Anyway, not a good day for my pinball ardor.
The conclusion for me: take even more care by handling brittle glasses and replace the translite/broken BG with a non-reflective non-destructible polycarbonat sheet.