The 9 Rules of Every Wile E. Coyote and Road Runner Cartoon. 1 minute read. By TIME Staff. March 6, 2015 7:59 AM EST. T he Looney Tunes universe had boundaries as severe as an Acme anvil to the head.

The Road Runner cannot harm the Coyote except by going “beep-beep!” RULE 2. No outside force can harm the Coyote — only his own ineptitude or the failure of ACME products.