Quoted from Vintage-Pinball:I once stood a wide body playfield glass from a Space Invaders machine on one of its corners on my tiled workshop floor and it nigh exploded into hundreds of tiny squares of glass. And even vacuuming what I thought was them all up, I still find the odd piece tucked behind a machine. I now handle glasses with much more care!
I had a Gold Wings I just sold to Grizlyrig that I pulled the glass to remove the balls and give a final wipe down and it exploded when it touched the garage floor, I'm still finding the odd bit months and months later.
Now I have a Berber carpet in the shop work area and its the only place glass of any sort is allowed to be put down.