Approximately sixteen minutes into the episode, Ralph and another boy are talking about Lisa's handling of the pony Princess. The other boy says "she's certainly tamed that horse" and Ralph says "yes, but what man can tame her?" However, when he speaks, it's Nelson's voice.
Lisa says she called Marge about the reed, but to no avail. In the next scene, Marge is seen at the talent show. This raises the question as to why Marge didn't simply take Lisa to the store. There is the chance that Marge was on her way to the talent show.
Chuck's hair is blue. He is normally seen with either blonde or sometimes brown hair.