I know just how you feel cat although you got off lightly I once had a four footer go and was at home at the time but heard nothing, woke up in the morning to find water and gravel all over the lounge and all my lovely fish dead the cause was my nice cichlids had dug down through the gravel causing rocks to move cracking bottom of the tank which caused the front to blow out.
The most upsetting thing was that my large clowns were spawning at the time .
To stop this I now only use sand in my tanks with a piece of polystyrene under the sand to stop rocks cracking the glass if the fish dig!
And to top it off the insurance company would not pay to have carpet dried out $750 bill :evil: