Nonsensical stuff.
I often say that nonsense is only funny if it is put into an environment where it makes at least partial sense, or the environment around it is a normal environment. At least, that's the way I feel.
Beat up a carrot with a jacket with only a plain colour to serve as a background, and it's not amazingly funny. Then, if you take the same thing and put it into a normal situation, it becomes a perversion of your expectations and ccan often make you laugh.
With this movie, Krinkels doesn't pretend that his world is normal. However, the way that the characters behave initially lure us into thinking that this may be his interpretation of the real world.
However, I might argue that had he kept up the pretence, or made more of an effort to place it into errily familiar surroundings, we might have found ourselves laughing more.
Maybe even a short scen with the character coming out of his house, and walking down the street, only to encounter the rest of the story.
N.B. AS ALWAYS, THIS IS MY OPINON. I CAN ONLY STATE MY OPINION, AS THAT IS ALL THAT I AM SURE OF.