I was gonna write about Mama's funeral but Lamont and Ms. Marcus going back and forth zapped all the ideas from my head.
Woodson's use of the word "zapped" apropos of the speaker's conceptions signifies that their disappearance was instantaneous. Given that these notions regarded his mother's demise, toward whom he presumably was highly affectionate, and he was intending to write poetry, necessitating profound and often introspective thought, one may conjecture that these ideas had great psychological magnitude; thus, the fact that such significant thoughts were erased so suddenly and completely by an argument that did not concern him—a menial extraneous phenomenon—illuminates that diversions can effortlessly alter one's intentions or how they are executed.