פירוש על קידושין 61:5

[If] she is divorced: Such that my mother is not obligated to honor my father. [If so], what is [the law]?

From your eyelashes: [These are] the hairs in the rows of eyelids. It is evident that you were orphaned, so your eyelashes fell out due to the crying. As it as we say [in Sanhedrin] (104b), "And Rabban Shimon ben Gamliel heard her voice and cried with her until his eyelashes fell out.

That you are the son of a widow And that you do not need [my answer] in practice. Rather you have come to learn, and I tell you that the honor of both of them is the same upon you.

Pour water for them into a pitcher and squawk: Crow to them, as we crow to chickens. And since he did not need to do [this in practice], but he asked him as if he had to do [it] - "my mother and father said" - [Rabbi Yehoshua] answered him with a jocular expression.

My wife (and mother, and pretty much every other woman I know) would not be too pleased with the rule from this source.
But in the end, R. Joshua does rule that if the woman is divorced then the son owes them equal honor. If they’re both hollering for water, then all one can do is put the water on the floor screech at them as one does to chickens!