What did those cats do to him...?
With dogs, you get the pooping (which is at least half an owner problem), squirrels dig up my yard, gophers same, ants all over the place. Can't say I've ever had an issue with cats, but I trust the creator of the project has a reason, and as a cat lover, I'd laugh my ass off at video of a cat getting hit by surprise sprinklers.
"Cats regurgitate when they eat grass because they lack the necessary enzymes to break down vegetable matter. Does this mean your cat likes to throw up? Well, while it's doubtful that kitty enjoys the act, this up-chucking sensation may eliminate all indigestible matter from the cat's digestive tract, making it feel a whole lot better. This is important because cats eat their prey as is, including both the edible and inedible parts (fur, bones, feathers, etc.)"