At first sight, the following text (sent to me by a friend) appears to be unintelligible, but in fact it turns out to be perfectly readable:
Aoccdrnig to rscheearch at an Elingsh uinervtisy, it deosn't mttaer in waht oredr the ltteers in a wrod are. The olny iprmoetnt tihng is taht the frist and lsat ltteers are at the rghit pclae. The rset can be a toatl mses, and you can sitll raed it wouthit any porbelms. Tihs is bcuseae we do not raed ervey lteter by itslef but the wrod as a wlohe.
Talking about apparently unintelligible stuff, you might contemplate the following delightful case (also sent to me by a friend):
If you click the image, you'll be offered a baffling French-language video [requires the Windows Media Player]. In case you imagine that a knowledge of spoken French would enable you to know what it's all about, I'm afraid I must inform you that this is not the case. Even for somebody who understands perfectly all that is said in this video, the affair still remains highly mysterious, indeed incomprehensible. But here are few hints about what seems to be happening. The fellow is building this space vessel in his backyard with the aim of setting out on an astral voyage. The high point of the video, towards the end, is when his mother gives us a glimpse of the vessel's electronic guidance device, which will be controlled by the guy's mind, using parapsychology.