About half the people I have shown these to didn't get the bigbird one. So here it is:
Big bird and the farmer are in a chicken coop, and one of the boxes says For Rent. Big Bird wants to rent a place to live, but he is too Big of a Bird to live there.
I'd rather the cartoon to be funny without any text, but I didn't think enough people would get it if I didn't have any there. I think the rest were just plays on on a song, a jackass fireman, and shitty abstract art. I guess everyone gets those.