There really isn’t any reason why this should be funny.
TEE RECK IZ BLOO!! BLOO!!! HAHAHA!
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Nonetheless, I find it hilarious and laugh every time I see it. Is the cat a mad scientist? Are the cat and the Tee Recks confined together in an asylum for the mentally unbalanced? I don’t have a clue. What’s beautiful, however, is this:
There Will Be Bloo

Ticket stub from the (truly great) film There Will Be Blood, only our friends at the theater managed to make it Bloo. This delights me and maybe one other person, and if it delights any more of you, we might have a proper meme-birth on our hands. Nifty.