WEEHAWKEN, N.J. (CBSNewYork) — E-ZPass is not just for paying tolls anymore.

A New Jersey driver, known on the Internet as “Puking Monkey,” discovered his E-ZPass was being used to track his car even when he was nowhere near a toll booth, according to Forbes.

The man rigged his E-ZPass to a miniature plastic cow that would moo whenever the transponder was read, Forbes reported.