When the time comes for your brain to process the information, the second word comes up faster than the first one. So when it's in your head, all of a sudden, it comes out backwards and you think of the word backwards.
“The best an American can look forward to is the lonely pleasure of one who stands at long last on a chilly and inhospitable mountaintop where few have been before, where few can follow and where few will consent to believe he has been.”