You know CAPTCHAs, those totally unnecessary challenge-response tests that appear right before you download a song or stream a movie online?  Most of the time they're incredibly hard to read and you have to retry at least 10 times before getting the word or number combination just right. Every now and then, though, you get an absolutely unbelievable CAPTCHA that makes all the annoying ones worth it. Here are 30 ridiculous ones that will have you in tears.