I've been servicing a location game, and on my last visit, the glass appeared to have cracked.
A number of fuses also blew, and a few LED bulbs melted (a few feature lamps and a couple backbox flashers).
I can't say I've ever seen anything like this happen before--DMDs have fairly thick glass. Thought granted, it was just starting to outgas. The speaker plastic was undamaged, so I doubt it was physical damage, especially considering the other issues that surfaced.