Youtube Haiku: Any almost poetic video under 14 seconds. Don't ask me why 14 seconds; it's just a number I have learned from experience. Videos can still be poetic after 15 or longer, but no longer than 30 seconds.
In historic art pieces depicting multiple humans, there is a law that at least one of those humans will look like they have no clue how or why they got there. It's like Where's Waldo, except instead of looking for Waldo you're looking for the dude that looks like he just dropped acid.