Ouch, sorry to hear that! But at least your Oscars are okay, I mean what if this happened and you were away. This got me thinking too, well not so much thinking but reading some other forums discussing the physics of a tank which isn't level. Here's a thought, take your level and check the floor under the tank, see if its level....If it is then perhaps it was the stand itself which wasn't level and the you've got a case.