Watching this video brings two things to my mind: the first is Meet The Fockers, and the second is now, how do we get this cat to use the toilet and flush.
He is apparently a little obsessed with the swirly whirly of the toilet water as it gets flushed down the toilet, but it is absolutely amazing that he made the connection between the lever and the oh-so-familiar whoosh of the toilet.
I do say, he could be quite a bit more destructive by setting his eyes on the toilet paper that is hanging right next to the lever; I know that is where my cat would have focused his attention.
And, that is pretty smart of the kitty to realize what that lever does, and it equals hours of entertainment. Maybe not so good in a drought, but good if you need your kitty off your back for a few.