alcohol that fermented and broke its container, maybe in a closed off area? @duglop
@Armchaircouch at first thought it might have been an led light (they do pop loud like that) but all my lights seem to be working properly....
i hear odd sounds occasionally too around here. when i check, nothing. sound is deceptive though. sometimes it's hard to tell whence it came.
@holon42 it was weird - nothing shattered, no odd smells, everything electrical still works - I've heard led bulbs go pop like that but my lights are still working - no electrical smell at all- thought perhaps it may have been an inline fuse but I don't have anything like that...