What could have been a boring presentation as to how to remove algae from a swimming pool was turned into something fun. Few film makers will go to these lengths to make sure their viewers get a real kick out of what they are watching but when they do, it makes the movie what it should be, entertaining.
As you saw instead of just narrating how it should be done, he let the props lead him into what really happens and then what should be done about it.
This technique should be employed in all films. I call it “getting dirty”. It provides more excitement, intrigue, inducing smiles and laughter with simple effective presentation as to how to solve a common problem.