I'd suggest you read up on what sarcasm means, because you apparently are unable to recognize it when it slaps you in the face, then kicks you in the balls and slowly paints on your chest with crayons.
If you still don't get it, this flash contained two "jokes". The first, much simpler one, was the guy breaking his neck. The second one was a sarcastic recreation of how some people treat pieces of art as trash because they disliked a single part of it that was unnatural but still fit into the picture.
Something similar would be if someone give a video 0.5 stars because they thought the creator was serious when he used sarcasm. (Hint: You did just that.)