Panel 1: We see Mike sitting at a table happily belching with gusto after having taken a drink from his can of soda.
Panel 2: Uh-oh. Here comes Elly ready to crush his attempt to feel good. She tells him she will not tolerate that disgusting noise in her house.
Panel 3: She then takes his soda away and bellows that she doesn't want to hear him do that again. He walks away with a downcast expression on his face.
Panel 4: He then asks Lawrence how a guy is supposed to get good at something if he isn't allowed to practice.
Summary: Children are an intolerable burden and Elly should be praised for having to endure them.[/sarcasm] While I don't approve of children deliberately acting ill-mannered myself, I, unlike Lynn or Elly, realize that there are better ways to handle it. I also realize that his finding out that Elly doesn't (Chomp-Gulp-BRRRRRRAAAAAAAPPPP!!!) practice what she preaches will naturally add to his resentment of her.
ETA: Lynn's celebrating Canada Day by showing Edgar chewing on a rubber mouse. On the Fourth of July, the Maple Leaf over the 'j' becomes a star.