If it were my pool, I would surround it with cameras,. so I can catch every expression. I would install a fantastic sound system -multiple speakers to recreate the most real sound. I'd have the pool scrubbed so clean the glass would seem to disappear, and fill it with the clearest water , science can make. Then I'd throw the best pool party for all those wealthy elite. Then, when they were swimming, and yelling, "Marco", I'd blare over the sound system, "CRAAAAACCKKKKKK".