I Love You, Internet
From some website:
Now to cover the other end of the spectrum I think absolute craziest Twitter background title belongs to Mr. Michael Ian Black in which has a depiction of him hiding behind Dr. Pepper cans evidently naked and apparently strangling a unicorn while Demi Moore is looking on.
This background seems to be helping him gain followers because he also has over a quarter of a million followers, even though he is not famous. He does claim to be a famous comedian but his claim to fame is from an obscure show on MTV which no one watched since MTV has stopped playing video and started ripping off Mexican TV game shows. His Twitter background can be seen at http://twitter.com/michaelianblack