Only two, came down one moring to find 2 X 4ft tropical fresh water tanks had both emptied themselves over the floor, biggest argument with insurance company bar none for a new carpet.
second was in the pond, fed the fish early before wandering off to work, everything seemed ok, steaming hot day, came home all the fish doing the backstroke, at some point the pump had packed up and due to the very high temperature the O2 level obviously dropped.

__________________
The bald headed grey beard
Wherever you go there you are!