Marisa (frantic): "Yuu!! Schtinky!! I can'ch chake ich eajy wike dish!! I'm wunning
away eajy! ...Why ij ich fowwowing meee!?"
It seems she's bothered by her own poop. "Stinky", she says... It's just bean paste, though... As she escapes, the water currents she creates in her wake drag the poo along with her. Yep, she's a retard.