Can you decipher Eric's writing? He will unveil the mathematical mystery of reverse writing. It's not magic ... it's mathematical! The Pedagogical Side: This segment introduces reverse writing, when words are written in the opposite direction in the way they are normally written in a given language, in order to read them normally in a mirror. The most common modern example of reverse writing is at the front of ambulances - the word "AMBULANCE" is written in reverse so that other drivers can read it in their mirrors.