It's a Palindrome - like "able was I ere I saw Elba". It reads the same backwards and forwards.
My son dvr's Time Warp Trio and loves this line. When I read it I called out "Hey DS! Go hang a salami!" Two seconds later he yelled back "I'm a lasagna hog!"
FWIW, it's a GREAT kids show with a lot of world history to learn and a lot of good adult humor.