Killian Advertising posted samples of "Cover Letters from Hell" that they've received. Some samples (the comments are theirs):
"The colors red, blue, and lavender are those that I identify with the most. I feel they accurately describe my personality. I choose red because I turn red when I get embarrassed ...." [That "red" thing must come up daily. We pulled the plug on this because you get the drift; the subsequent "blue" and "lavender" explanations didn't substantially improve her employment chances.]
"Another reason [you should hire me is] your web site is very unfriendly and may sway some clients into not working with you. People use websites of companies such as yours for research and your website thinks that it is witty, but comes off very dull and cheezy." [Editor's note: This is the first entry in a new category we call "Insult Your Way to the Top!"]
Hat tip to the National Association of Manufacturers" blog (it sounds boring, but it's not, I swear).