I saw a commercial for an above-ground pool, it was 30...

I saw a commercial for an above-ground pool, it was 30 seconds long. Because that's the maximum amount of time you can picture yourself having fun in an above-ground pool. If it was 31 seconds, the actor would say "The water is only up to here? What do I do now? Throw the ball back to Jimmy? Or put some goggles on and look at his feet?"