The Interrupting Cow Joke is a knock-knock joke that Hilo really likes, and loves telling his friends--over and over again. It appeared in Saving the Whole Wide World.
How it goes
"Interrupting Cow Wh--"
Hilo: Hilo really likes the joke. He loves telling it to his friends.
D.J: D.J is probably nuetral on the joke; just a bit annoyed he keeps saying it over and over again. When Hilo told it to Gina, he mostly didn't react. He has heard it from Hilo.
Gina: Gina thinks the joke is funny. However, the second time Hilo says it, Gina winces a bit; annoyed that he keeps saying it.
Connie and Bonnie: Connie and Bonnie hate the joke. When Hilo says "Do you want to hear something funny?" Connie (or Bonnie) responds with "Tell that joke again and I will beat you!"
Polly: Polly loves the joke and thinks it's hilaurous.