There's an email that's been floating around for a while, where the words are scrambled. As long as you don't think about the words as you're reading them, you can read it just fine. The trick is, the first and last letters stay the same, and only the inner letters get scrambled. Your brain reads individual words, not letters.
Teerh's an eaiml ttha's been ftloiang aurnod for a wilhe, wehre the wdros are smrbaecld. As lnog as you do'nt thnik aubot the wodrs as y'oure rndieag tehm, you can raed it jsut fnie. The tcirk is, the frsit and lsat ltteers saty the smae, and olny the iennr ltertes get slecmbard. Yuor biarn rdaes iuiidavdnl wrods, not lettres.