One of the best videos I've ever watched! But since the cats keep coming back, I think he should switch out the garden hose for an electric plate that gives the cats an electric jolt when they walk on it. That's how a friend of mine taught his cats to stay off the kitchen counter when he wasn't home. After a couple "lessons" his cats wouldn't get on the counter even when he left an open can of cat food on the counter while he went to work.

Sg