i dont appreciate that very much but i dont class myself as dim particularly.
Just for the record: I'm dead smart, me.

Best I can get is: pigs will fly, and do a poo, from which two armless men grow, then one of them grows down into the ground and up again (while his friend shakes) where he eats the man and they give birth to a flying pig. It then asks if we want to "play again?" At first I wondered if each panel represented a word that made some sentence - the man on the bench has a halo so.... "saint", flying pigs are "impossible", it does a poo "crap", that grows two men "sprout", who are armless "harmless" at which point I gave up.
My best guess: We are overthinking it, a lot

I hope so, because otherwise it'd mean we are overlooking something obvious (which I do so often I might as well trade mark it).
Perhaps it is an allegory for the stupidity and meaningless of our life on this ball of mud? Stuff I don't "get" usually is

I await House of Usher's explanation of what is going on, followed by a quick round of "D'oh"s.