So here we were, minding our own business, when all of a sudden a loud bang gave us quite a start. After a bit of investigation, we found this on the TV stand:

Weeeeird huh? Has had our media box (slightly larger than a Shuttle) sitting on it for the last maybe 18 months to 2 years, it’s fairly well supported (in the first pic, you can see the metal support bars under the intact bottom shelf), heat doesn’t seem to be an issue. Anyone have any ideas?