Logos to Think about it

Do you know some logos that have second intensions?  You see something at first but just in the second look you can really see all it's meaning? I really enjoy this king of work. I think it's smart. I recently read a post with the same theme (firstwebdesigner.com) but I decided to look for more examples. Look what I've found (and the last one is a logo made by me that fits just well).