During the cartoon, Pinky constantly uses hark instead
of his usual interjections like narf or zort.
Eventually at one point, we hear Brain say:
Will you stop saying hark!
Originally, this line was:
Will you stop harking me!
That line is meant to sound similar to a Yiddish expression,
"Stop horking me!" said to someone who is bothersome.
It is believed that the producers at the ADR session simply
did not get the joke, and had the line changed to something
that made better sense as a straightforward sentence.