Last night I was watching Indiana Jones and the Kingdom of the Crystal Skulls (longest title ever!) when I hear that loud BANG; I got up and looked around the house and didn't see anything wrong so I went back to watching my movie. This morning I went into the bathroom and noticed that there was glass all over the sink and that one of the light bulbs was gone (save for the metal bit still in the fixture). What's really stumping about this is that the light was not on when it exploded! A bit like spontaneous combustion, but in light bulb form. It was just an ordinary filament light bulb (60 watts I believe); one of the round bathroom styles ones. Does anyone have any clue as to what could cause a lightbulb to explode when there is not power running to it?