- " Meep, Meep!"
- —Unsafe at Any Speed
Roadrunnersaurus appears at the end of Unsafe at Any Speed, when Wile E. Coyote travels through time, resembling a dinosaur-like creature. When the Roadrunnersaurus found him, he yelled deeply "Meep Meep!" and Wile E. Coyote runs away, with the Roadrunnersaurus chasing after him.
- Although he was unnamed in the short, he was nicknamed "Roadrunnersaurs" by some fans, after the short aired.